diff --git a/.gitignore b/.gitignore
index 44bd27aeed..7fd2b68d51 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 *.tmp
 *.go
 tmp
+*.log
diff --git a/guix/derivations.scm b/guix/derivations.scm
index 81fc21565d..d0e90a9952 100644
--- a/guix/derivations.scm
+++ b/guix/derivations.scm
@@ -42,7 +42,10 @@
             derivation-input-sub-derivations
 
             fixed-output-derivation?
-            derivation-hash))
+            derivation-hash
+
+            read-derivation
+            write-derivation))
 
 ;;;
 ;;; Nix derivations, as implemented in Nix's `derivations.cc'.
diff --git a/srfi/srfi-64.scm b/srfi/srfi-64.scm
new file mode 100644
index 0000000000..03a1c0c1d5
--- /dev/null
+++ b/srfi/srfi-64.scm
@@ -0,0 +1,39 @@
+(define-module (srfi srfi-64)
+  #:export (test-begin ;; must be listed first, since in Kawa (at least) it is "magic".
+            test-end test-assert test-eqv test-eq test-equal
+            test-approximate test-assert test-error test-apply test-with-runner
+            test-match-nth test-match-all test-match-any test-match-name
+            test-skip test-expect-fail test-read-eval-string
+            test-runner-group-path test-group-with-cleanup
+            test-result-ref test-result-set! test-result-clear test-result-remove
+            test-result-kind test-passed?
+            test-log-to-file
+                                                  ; Misc test-runner functions
+            test-runner? test-runner-reset test-runner-null
+            test-runner-simple test-runner-current test-runner-factory test-runner-get
+            test-runner-create test-runner-test-name
+            ;; test-runner field setter and getter functions - see %test-record-define:
+            test-runner-pass-count test-runner-pass-count!
+            test-runner-fail-count test-runner-fail-count!
+            test-runner-xpass-count test-runner-xpass-count!
+            test-runner-xfail-count test-runner-xfail-count!
+            test-runner-skip-count test-runner-skip-count!
+            test-runner-group-stack test-runner-group-stack!
+            test-runner-on-test-begin test-runner-on-test-begin!
+            test-runner-on-test-end test-runner-on-test-end!
+            test-runner-on-group-begin test-runner-on-group-begin!
+            test-runner-on-group-end test-runner-on-group-end!
+            test-runner-on-final test-runner-on-final!
+            test-runner-on-bad-count test-runner-on-bad-count!
+            test-runner-on-bad-end-name test-runner-on-bad-end-name!
+            test-result-alist test-result-alist!
+            test-runner-aux-value test-runner-aux-value!
+            ;; default/simple call-back functions, used in default test-runner,
+            ;; but can be called to construct more complex ones.
+            test-on-group-begin-simple test-on-group-end-simple
+            test-on-bad-count-simple test-on-bad-end-name-simple
+            test-on-final-simple test-on-test-end-simple
+            test-on-final-simple))
+
+;; Load Per Bothner's original SRFI-64 implementation.
+(load-from-path "srfi/srfi-64.upstream.scm")
diff --git a/srfi/srfi-64.upstream.scm b/srfi/srfi-64.upstream.scm
new file mode 100644
index 0000000000..e9ab4a3605
--- /dev/null
+++ b/srfi/srfi-64.upstream.scm
@@ -0,0 +1,978 @@
+;; Copyright (c) 2005, 2006 Per Bothner
+;;
+;; Permission is hereby granted, free of charge, to any person
+;; obtaining a copy of this software and associated documentation
+;; files (the "Software"), to deal in the Software without
+;; restriction, including without limitation the rights to use, copy,
+;; modify, merge, publish, distribute, sublicense, and/or sell copies
+;; of the Software, and to permit persons to whom the Software is
+;; furnished to do so, subject to the following conditions:
+;;
+;; The above copyright notice and this permission notice shall be
+;; included in all copies or substantial portions of the Software.
+;;
+;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+;; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+;; BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+;; ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+;; CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+;; SOFTWARE.
+
+(cond-expand
+ (chicken
+  (require-extension syntax-case))
+ (guile
+  (use-modules (ice-9 syncase) (srfi srfi-9)
+	       ;;(srfi srfi-34) (srfi srfi-35) - not in Guile 1.6.7
+	       (srfi srfi-39)))
+ (sisc
+  (require-extension (srfi 9 34 35 39)))
+ (kawa
+  (module-compile-options warn-undefined-variable: #t
+			  warn-invoke-unknown-method: #t)
+  (provide 'srfi-64)
+  (provide 'testing)
+  (require 'srfi-34)
+  (require 'srfi-35))
+ (else ()
+  ))
+
+(cond-expand
+ (kawa
+  (define-syntax %test-export
+    (syntax-rules ()
+      ((%test-export test-begin . other-names)
+       (module-export %test-begin . other-names)))))
+ (else
+  (define-syntax %test-export
+    (syntax-rules ()
+      ((%test-export . names) (if #f #f))))))
+
+;; List of exported names
+(%test-export
+ test-begin ;; must be listed first, since in Kawa (at least) it is "magic".
+ test-end test-assert test-eqv test-eq test-equal
+ test-approximate test-assert test-error test-apply test-with-runner
+ test-match-nth test-match-all test-match-any test-match-name
+ test-skip test-expect-fail test-read-eval-string
+ test-runner-group-path test-group-with-cleanup
+ test-result-ref test-result-set! test-result-clear test-result-remove
+ test-result-kind test-passed?
+ test-log-to-file
+ ; Misc test-runner functions
+ test-runner? test-runner-reset test-runner-null
+ test-runner-simple test-runner-current test-runner-factory test-runner-get
+ test-runner-create test-runner-test-name
+ ;; test-runner field setter and getter functions - see %test-record-define:
+ test-runner-pass-count test-runner-pass-count!
+ test-runner-fail-count test-runner-fail-count!
+ test-runner-xpass-count test-runner-xpass-count!
+ test-runner-xfail-count test-runner-xfail-count!
+ test-runner-skip-count test-runner-skip-count!
+ test-runner-group-stack test-runner-group-stack!
+ test-runner-on-test-begin test-runner-on-test-begin!
+ test-runner-on-test-end test-runner-on-test-end!
+ test-runner-on-group-begin test-runner-on-group-begin!
+ test-runner-on-group-end test-runner-on-group-end!
+ test-runner-on-final test-runner-on-final!
+ test-runner-on-bad-count test-runner-on-bad-count!
+ test-runner-on-bad-end-name test-runner-on-bad-end-name!
+ test-result-alist test-result-alist!
+ test-runner-aux-value test-runner-aux-value!
+ ;; default/simple call-back functions, used in default test-runner,
+ ;; but can be called to construct more complex ones.
+ test-on-group-begin-simple test-on-group-end-simple
+ test-on-bad-count-simple test-on-bad-end-name-simple
+ test-on-final-simple test-on-test-end-simple
+ test-on-final-simple)
+
+(cond-expand
+ (srfi-9
+  (define-syntax %test-record-define
+    (syntax-rules ()
+      ((%test-record-define alloc runner? (name index setter getter) ...)
+       (define-record-type test-runner
+	 (alloc)
+	 runner?
+	 (name setter getter) ...)))))
+ (else
+  (define %test-runner-cookie (list "test-runner"))
+  (define-syntax %test-record-define
+    (syntax-rules ()
+      ((%test-record-define alloc runner? (name index getter setter) ...)
+       (begin
+	 (define (runner? obj)
+	   (and (vector? obj)
+		(> (vector-length obj) 1)
+		(eq (vector-ref obj 0) %test-runner-cookie)))
+	 (define (alloc)
+	   (let ((runner (make-vector 22)))
+	     (vector-set! runner 0 %test-runner-cookie)
+	     runner))
+	 (begin
+	   (define (getter runner)
+	     (vector-ref runner index)) ...)
+	 (begin
+	   (define (setter runner value)
+	     (vector-set! runner index value)) ...)))))))
+
+(%test-record-define
+ %test-runner-alloc test-runner?
+ ;; Cumulate count of all tests that have passed and were expected to.
+ (pass-count 1 test-runner-pass-count test-runner-pass-count!)
+ (fail-count 2 test-runner-fail-count test-runner-fail-count!)
+ (xpass-count 3 test-runner-xpass-count test-runner-xpass-count!)
+ (xfail-count 4 test-runner-xfail-count test-runner-xfail-count!)
+ (skip-count 5 test-runner-skip-count test-runner-skip-count!)
+ (skip-list 6 %test-runner-skip-list %test-runner-skip-list!)
+ (fail-list 7 %test-runner-fail-list %test-runner-fail-list!)
+ ;; Normally #t, except when in a test-apply.
+ (run-list 8 %test-runner-run-list %test-runner-run-list!)
+ (skip-save 9 %test-runner-skip-save %test-runner-skip-save!)
+ (fail-save 10 %test-runner-fail-save %test-runner-fail-save!)
+ (group-stack 11 test-runner-group-stack test-runner-group-stack!)
+ (on-test-begin 12 test-runner-on-test-begin test-runner-on-test-begin!)
+ (on-test-end 13 test-runner-on-test-end test-runner-on-test-end!)
+ ;; Call-back when entering a group. Takes (runner suite-name count).
+ (on-group-begin 14 test-runner-on-group-begin test-runner-on-group-begin!)
+ ;; Call-back when leaving a group.
+ (on-group-end 15 test-runner-on-group-end test-runner-on-group-end!)
+ ;; Call-back when leaving the outermost group.
+ (on-final 16 test-runner-on-final test-runner-on-final!)
+ ;; Call-back when expected number of tests was wrong.
+ (on-bad-count 17 test-runner-on-bad-count test-runner-on-bad-count!)
+ ;; Call-back when name in test=end doesn't match test-begin.
+ (on-bad-end-name 18 test-runner-on-bad-end-name test-runner-on-bad-end-name!)
+ ;; Cumulate count of all tests that have been done.
+ (total-count 19 %test-runner-total-count %test-runner-total-count!)
+ ;; Stack (list) of (count-at-start . expected-count):
+ (count-list 20 %test-runner-count-list %test-runner-count-list!)
+ (result-alist 21 test-result-alist test-result-alist!)
+ ;; Field can be used by test-runner for any purpose.
+ ;; test-runner-simple uses it for a log file.
+ (aux-value 22 test-runner-aux-value test-runner-aux-value!)
+)
+
+(define (test-runner-reset runner)
+    (test-runner-pass-count! runner 0)
+    (test-runner-fail-count! runner 0)
+    (test-runner-xpass-count! runner 0)
+    (test-runner-xfail-count! runner 0)
+    (test-runner-skip-count! runner 0)
+    (%test-runner-total-count! runner 0)
+    (%test-runner-count-list! runner '())
+    (%test-runner-run-list! runner #t)
+    (%test-runner-skip-list! runner '())
+    (%test-runner-fail-list! runner '())
+    (%test-runner-skip-save! runner '())
+    (%test-runner-fail-save! runner '())
+    (test-runner-group-stack! runner '()))
+
+(define (test-runner-group-path runner)
+  (reverse (test-runner-group-stack runner)))
+
+(define (%test-null-callback runner) #f)
+
+(define (test-runner-null)
+  (let ((runner (%test-runner-alloc)))
+    (test-runner-reset runner)
+    (test-runner-on-group-begin! runner (lambda (runner name count) #f))
+    (test-runner-on-group-end! runner %test-null-callback)
+    (test-runner-on-final! runner %test-null-callback)
+    (test-runner-on-test-begin! runner %test-null-callback)
+    (test-runner-on-test-end! runner %test-null-callback)
+    (test-runner-on-bad-count! runner (lambda (runner count expected) #f))
+    (test-runner-on-bad-end-name! runner (lambda (runner begin end) #f))
+    runner))
+
+;; Not part of the specification.  FIXME
+;; Controls whether a log file is generated.
+(define test-log-to-file #t)
+
+(define (test-runner-simple)
+  (let ((runner (%test-runner-alloc)))
+    (test-runner-reset runner)
+    (test-runner-on-group-begin! runner test-on-group-begin-simple)
+    (test-runner-on-group-end! runner test-on-group-end-simple)
+    (test-runner-on-final! runner test-on-final-simple)
+    (test-runner-on-test-begin! runner test-on-test-begin-simple)
+    (test-runner-on-test-end! runner test-on-test-end-simple)
+    (test-runner-on-bad-count! runner test-on-bad-count-simple)
+    (test-runner-on-bad-end-name! runner test-on-bad-end-name-simple)
+    runner))
+
+(cond-expand
+ (srfi-39
+  (define test-runner-current (make-parameter #f))
+  (define test-runner-factory (make-parameter test-runner-simple)))
+ (else
+  (define %test-runner-current #f)
+  (define-syntax test-runner-current
+    (syntax-rules ()
+      ((test-runner-current)
+       %test-runner-current)
+      ((test-runner-current runner)
+       (set! %test-runner-current runner))))
+  (define %test-runner-factory test-runner-simple)
+  (define-syntax test-runner-factory
+    (syntax-rules ()
+      ((test-runner-factory)
+       %test-runner-factory)
+      ((test-runner-factory runner)
+       (set! %test-runner-factory runner))))))
+
+;; A safer wrapper to test-runner-current.
+(define (test-runner-get)
+  (let ((r (test-runner-current)))
+    (if (not r)
+	(cond-expand
+	 (srfi-23 (error "test-runner not initialized - test-begin missing?"))
+	 (else #t)))
+    r))
+
+(define (%test-specificier-matches spec runner)
+  (spec runner))
+
+(define (test-runner-create)
+  ((test-runner-factory)))
+
+(define (%test-any-specifier-matches list runner)
+  (let ((result #f))
+    (let loop ((l list))
+      (cond ((null? l) result)
+	    (else
+	     (if (%test-specificier-matches (car l) runner)
+		 (set! result #t))
+	     (loop (cdr l)))))))
+
+;; Returns #f, #t, or 'xfail.
+(define (%test-should-execute runner)
+  (let ((run (%test-runner-run-list runner)))
+    (cond ((or
+	    (not (or (eqv? run #t)
+		     (%test-any-specifier-matches run runner)))
+	    (%test-any-specifier-matches
+	     (%test-runner-skip-list runner)
+	     runner))
+	    (test-result-set! runner 'result-kind 'skip)
+	    #f)
+	  ((%test-any-specifier-matches
+	    (%test-runner-fail-list runner)
+	    runner)
+	   (test-result-set! runner 'result-kind 'xfail)
+	   'xfail)
+	  (else #t))))
+
+(define (%test-begin suite-name count)
+  (if (not (test-runner-current))
+      (test-runner-current (test-runner-create)))
+  (let ((runner (test-runner-current)))
+    ((test-runner-on-group-begin runner) runner suite-name count)
+    (%test-runner-skip-save! runner
+			       (cons (%test-runner-skip-list runner)
+				     (%test-runner-skip-save runner)))
+    (%test-runner-fail-save! runner
+			       (cons (%test-runner-fail-list runner)
+				     (%test-runner-fail-save runner)))
+    (%test-runner-count-list! runner
+			     (cons (cons (%test-runner-total-count runner)
+					 count)
+				   (%test-runner-count-list runner)))
+    (test-runner-group-stack! runner (cons suite-name
+					(test-runner-group-stack runner)))))
+(cond-expand
+ (kawa
+  ;; Kawa has test-begin built in, implemented as:
+  ;; (begin
+  ;;   (cond-expand (srfi-64 #!void) (else (require 'srfi-64)))
+  ;;   (%test-begin suite-name [count]))
+  ;; This puts test-begin but only test-begin in the default environment.,
+  ;; which makes normal test suites loadable without non-portable commands.
+  )
+ (else
+  (define-syntax test-begin
+    (syntax-rules ()
+      ((test-begin suite-name)
+       (%test-begin suite-name #f))
+      ((test-begin suite-name count)
+       (%test-begin suite-name count))))))
+
+(define (test-on-group-begin-simple runner suite-name count)
+  (if (null? (test-runner-group-stack runner))
+      (begin
+	(display "%%%% Starting test ")
+	(display suite-name)
+	(if test-log-to-file
+	    (let* ((log-file-name
+		    (if (string? test-log-to-file) test-log-to-file
+			(string-append suite-name ".log")))
+		   (log-file
+		    (cond-expand (mzscheme
+				  (open-output-file log-file-name 'truncate/replace))
+                                 (guile-2
+                                  (with-fluids ((%default-port-encoding
+                                                 "UTF-8"))
+                                    (open-output-file log-file-name)))
+				 (else (open-output-file log-file-name)))))
+	      (display "%%%% Starting test " log-file)
+	      (display suite-name log-file)
+	      (newline log-file)
+	      (test-runner-aux-value! runner log-file)
+	      (display "  (Writing full log to \"")
+	      (display log-file-name)
+	      (display "\")")))
+	(newline)))
+  (let ((log (test-runner-aux-value runner)))
+    (if (output-port? log)
+	(begin
+	  (display "Group begin: " log)
+	  (display suite-name log)
+	  (newline log))))
+  #f)
+
+(define (test-on-group-end-simple runner)
+  (let ((log (test-runner-aux-value runner)))
+    (if (output-port? log)
+	(begin
+	  (display "Group end: " log)
+	  (display (car (test-runner-group-stack runner)) log)
+	  (newline log))))
+  #f)
+
+(define (%test-on-bad-count-write runner count expected-count port)
+  (display "*** Total number of tests was " port)
+  (display count port)
+  (display " but should be " port)
+  (display expected-count port)
+  (display ". ***" port)
+  (newline port)
+  (display "*** Discrepancy indicates testsuite error or exceptions. ***" port)
+  (newline port))
+
+(define (test-on-bad-count-simple runner count expected-count)
+  (%test-on-bad-count-write runner count expected-count (current-output-port))
+  (let ((log (test-runner-aux-value runner)))
+    (if (output-port? log)
+	(%test-on-bad-count-write runner count expected-count log))))
+
+(define (test-on-bad-end-name-simple runner begin-name end-name)
+  (let ((msg (string-append (%test-format-line runner) "test-end " begin-name
+			    " does not match test-begin " end-name)))
+    (cond-expand
+     (srfi-23 (error msg))
+     (else (display msg) (newline)))))
+  
+
+(define (%test-final-report1 value label port)
+  (if (> value 0)
+      (begin
+	(display label port)
+	(display value port)
+	(newline port))))
+
+(define (%test-final-report-simple runner port)
+  (%test-final-report1 (test-runner-pass-count runner)
+		      "# of expected passes      " port)
+  (%test-final-report1 (test-runner-xfail-count runner)
+		      "# of expected failures    " port)
+  (%test-final-report1 (test-runner-xpass-count runner)
+		      "# of unexpected successes " port)
+  (%test-final-report1 (test-runner-fail-count runner)
+		      "# of unexpected failures  " port)
+  (%test-final-report1 (test-runner-skip-count runner)
+		      "# of skipped tests        " port))
+
+(define (test-on-final-simple runner)
+  (%test-final-report-simple runner (current-output-port))
+  (let ((log (test-runner-aux-value runner)))
+    (if (output-port? log)
+	(%test-final-report-simple runner log))))
+
+(define (%test-format-line runner)
+   (let* ((line-info (test-result-alist runner))
+	  (source-file (assq 'source-file line-info))
+	  (source-line (assq 'source-line line-info))
+	  (file (if source-file (cdr source-file) "")))
+     (if source-line
+	 (string-append file ":"
+			(number->string (cdr source-line)) ": ")
+	 "")))
+
+(define (%test-end suite-name line-info)
+  (let* ((r (test-runner-get))
+	 (groups (test-runner-group-stack r))
+	 (line (%test-format-line r)))
+    (test-result-alist! r line-info)
+    (if (null? groups)
+	(let ((msg (string-append line "test-end not in a group")))
+	  (cond-expand
+	   (srfi-23 (error msg))
+	   (else (display msg) (newline)))))
+    (if (and suite-name (not (equal? suite-name (car groups))))
+	((test-runner-on-bad-end-name r) r suite-name (car groups)))
+    (let* ((count-list (%test-runner-count-list r))
+	   (expected-count (cdar count-list))
+	   (saved-count (caar count-list))
+	   (group-count (- (%test-runner-total-count r) saved-count)))
+      (if (and expected-count
+	       (not (= expected-count group-count)))
+	  ((test-runner-on-bad-count r) r group-count expected-count))
+      ((test-runner-on-group-end r) r)
+      (test-runner-group-stack! r (cdr (test-runner-group-stack r)))
+      (%test-runner-skip-list! r (car (%test-runner-skip-save r)))
+      (%test-runner-skip-save! r (cdr (%test-runner-skip-save r)))
+      (%test-runner-fail-list! r (car (%test-runner-fail-save r)))
+      (%test-runner-fail-save! r (cdr (%test-runner-fail-save r)))
+      (%test-runner-count-list! r (cdr count-list))
+      (if (null? (test-runner-group-stack r))
+	  ((test-runner-on-final r) r)))))
+
+(define-syntax test-group
+  (syntax-rules ()
+    ((test-group suite-name . body)
+     (let ((r (test-runner-current)))
+       ;; Ideally should also set line-number, if available.
+       (test-result-alist! r (list (cons 'test-name suite-name)))
+       (if (%test-should-execute r)
+	   (dynamic-wind
+	       (lambda () (test-begin suite-name))
+	       (lambda () . body)
+	       (lambda () (test-end  suite-name))))))))
+
+(define-syntax test-group-with-cleanup
+  (syntax-rules ()
+    ((test-group-with-cleanup suite-name form cleanup-form)
+     (test-group suite-name
+		    (dynamic-wind
+			(lambda () #f)
+			(lambda () form)
+			(lambda () cleanup-form))))
+    ((test-group-with-cleanup suite-name cleanup-form)
+     (test-group-with-cleanup suite-name #f cleanup-form))
+    ((test-group-with-cleanup suite-name form1 form2 form3 . rest)
+     (test-group-with-cleanup suite-name (begin form1 form2) form3 . rest))))
+
+(define (test-on-test-begin-simple runner)
+ (let ((log (test-runner-aux-value runner)))
+    (if (output-port? log)
+	(let* ((results (test-result-alist runner))
+	       (source-file (assq 'source-file results))
+	       (source-line (assq 'source-line results))
+	       (source-form (assq 'source-form results))
+	       (test-name (assq 'test-name results)))
+	  (display "Test begin:" log)
+	  (newline log)
+	  (if test-name (%test-write-result1 test-name log))
+	  (if source-file (%test-write-result1 source-file log))
+	  (if source-line (%test-write-result1 source-line log))
+	  (if source-file (%test-write-result1 source-form log))))))
+
+(define-syntax test-result-ref
+  (syntax-rules ()
+    ((test-result-ref runner pname)
+     (test-result-ref runner pname #f))
+    ((test-result-ref runner pname default)
+     (let ((p (assq pname (test-result-alist runner))))
+       (if p (cdr p) default)))))
+
+(define (test-on-test-end-simple runner)
+  (let ((log (test-runner-aux-value runner))
+	(kind (test-result-ref runner 'result-kind)))
+    (if (memq kind '(fail xpass))
+	(let* ((results (test-result-alist runner))
+	       (source-file (assq 'source-file results))
+	       (source-line (assq 'source-line results))
+	       (test-name (assq 'test-name results)))
+	  (if (or source-file source-line)
+	      (begin
+		(if source-file (display (cdr source-file)))
+		(display ":")
+		(if source-line (display (cdr source-line)))
+		(display ": ")))
+	  (display (if (eq? kind 'xpass) "XPASS" "FAIL"))
+	  (if test-name
+	      (begin
+		(display " ")
+		(display (cdr test-name))))
+	  (newline)))
+    (if (output-port? log)
+	(begin
+	  (display "Test end:" log)
+	  (newline log)
+	  (let loop ((list (test-result-alist runner)))
+	    (if (pair? list)
+		(let ((pair (car list)))
+		  ;; Write out properties not written out by on-test-begin.
+		  (if (not (memq (car pair)
+				 '(test-name source-file source-line source-form)))
+		      (%test-write-result1 pair log))
+		  (loop (cdr list)))))))))
+
+(define (%test-write-result1 pair port)
+  (display "  " port)
+  (display (car pair) port)
+  (display ": " port)
+  (write (cdr pair) port)
+  (newline port))
+
+(define (test-result-set! runner pname value)
+  (let* ((alist (test-result-alist runner))
+	 (p (assq pname alist)))
+    (if p
+	(set-cdr! p value)
+	(test-result-alist! runner (cons (cons pname value) alist)))))
+
+(define (test-result-clear runner)
+  (test-result-alist! runner '()))
+
+(define (test-result-remove runner pname)
+  (let* ((alist (test-result-alist runner))
+	 (p (assq pname alist)))
+    (if p
+	(test-result-alist! runner
+				   (let loop ((r alist))
+				     (if (eq? r p) (cdr r)
+					 (cons (car r) (loop (cdr r)))))))))
+
+(define (test-result-kind . rest)
+  (let ((runner (if (pair? rest) (car rest) (test-runner-current))))
+    (test-result-ref runner 'result-kind)))
+
+(define (test-passed? . rest)
+  (let ((runner (if (pair? rest) (car rest) (test-runner-get))))
+    (memq (test-result-ref runner 'result-kind) '(pass xpass))))
+
+(define (%test-report-result)
+  (let* ((r (test-runner-get))
+	 (result-kind (test-result-kind r)))
+    (case result-kind
+      ((pass)
+       (test-runner-pass-count! r (+ 1 (test-runner-pass-count r))))
+      ((fail)
+       (test-runner-fail-count!	r (+ 1 (test-runner-fail-count r))))
+      ((xpass)
+       (test-runner-xpass-count! r (+ 1 (test-runner-xpass-count r))))
+      ((xfail)
+       (test-runner-xfail-count! r (+ 1 (test-runner-xfail-count r))))
+      (else
+       (test-runner-skip-count! r (+ 1 (test-runner-skip-count r)))))
+    (%test-runner-total-count! r (+ 1 (%test-runner-total-count r)))
+    ((test-runner-on-test-end r) r)))
+
+(cond-expand
+ (guile
+  (define-syntax %test-evaluate-with-catch
+    (syntax-rules ()
+      ((%test-evaluate-with-catch test-expression)
+       (catch #t
+         (lambda () test-expression)
+         (lambda (key . args) #f)
+         (lambda (key . args)
+           (display-backtrace (make-stack #t) (current-error-port))))))))
+ (kawa
+  (define-syntax %test-evaluate-with-catch
+    (syntax-rules ()
+      ((%test-evaluate-with-catch test-expression)
+       (try-catch test-expression
+		  (ex <java.lang.Throwable>
+		      (test-result-set! (test-runner-current) 'actual-error ex)
+		      #f))))))
+ (srfi-34
+  (define-syntax %test-evaluate-with-catch
+    (syntax-rules ()
+      ((%test-evaluate-with-catch test-expression)
+       (guard (err (else #f)) test-expression)))))
+ (chicken
+  (define-syntax %test-evaluate-with-catch
+    (syntax-rules ()
+      ((%test-evaluate-with-catch test-expression)
+       (condition-case test-expression (ex () #f))))))
+ (else
+  (define-syntax %test-evaluate-with-catch
+    (syntax-rules ()
+      ((%test-evaluate-with-catch test-expression)
+       test-expression)))))
+	    
+(cond-expand
+ ((or kawa mzscheme)
+  (cond-expand
+   (mzscheme
+    (define-for-syntax (%test-syntax-file form)
+      (let ((source (syntax-source form)))
+	(cond ((string? source) file)
+				((path? source) (path->string source))
+				(else #f)))))
+   (kawa
+    (define (%test-syntax-file form)
+      (syntax-source form))))
+  (define-for-syntax (%test-source-line2 form)
+    (let* ((line (syntax-line form))
+	   (file (%test-syntax-file form))
+	   (line-pair (if line (list (cons 'source-line line)) '())))
+      (cons (cons 'source-form (syntax-object->datum form))
+	    (if file (cons (cons 'source-file file) line-pair) line-pair)))))
+ (else
+  (define (%test-source-line2 form)
+    '())))
+
+(define (%test-on-test-begin r)
+  (%test-should-execute r)
+  ((test-runner-on-test-begin r) r)
+  (not (eq? 'skip (test-result-ref r 'result-kind))))
+
+(define (%test-on-test-end r result)
+    (test-result-set! r 'result-kind
+		      (if (eq? (test-result-ref r 'result-kind) 'xfail)
+			  (if result 'xpass 'xfail)
+			  (if result 'pass 'fail))))
+
+(define (test-runner-test-name runner)
+  (test-result-ref runner 'test-name ""))
+
+(define-syntax %test-comp2body
+  (syntax-rules ()
+		((%test-comp2body r comp expected expr)
+		 (let ()
+		   (if (%test-on-test-begin r)
+		       (let ((exp expected))
+			 (test-result-set! r 'expected-value exp)
+			 (let ((res (%test-evaluate-with-catch expr)))
+			   (test-result-set! r 'actual-value res)
+			   (%test-on-test-end r (comp exp res)))))
+		   (%test-report-result)))))
+
+(define (%test-approximimate= error)
+  (lambda (value expected)
+    (and (>= value (- expected error))
+         (<= value (+ expected error)))))
+
+(define-syntax %test-comp1body
+  (syntax-rules ()
+    ((%test-comp1body r expr)
+     (let ()
+       (if (%test-on-test-begin r)
+	   (let ()
+	     (let ((res (%test-evaluate-with-catch expr)))
+	       (test-result-set! r 'actual-value res)
+	       (%test-on-test-end r res))))
+       (%test-report-result)))))
+
+(cond-expand
+ ((or kawa mzscheme)
+  ;; Should be made to work for any Scheme with syntax-case
+  ;; However, I haven't gotten the quoting working.  FIXME.
+  (define-syntax test-end
+    (lambda (x)
+      (syntax-case (list x (list 'quote (%test-source-line2 x))) ()
+	(((mac suite-name) line)
+	 (syntax
+	  (%test-end suite-name line)))
+	(((mac) line)
+	 (syntax
+	  (%test-end #f line))))))
+  (define-syntax test-assert
+    (lambda (x)
+      (syntax-case (list x (list 'quote (%test-source-line2 x))) ()
+	(((mac tname expr) line)
+	 (syntax
+	  (let* ((r (test-runner-get))
+		 (name tname))
+	    (test-result-alist! r (cons (cons 'test-name tname) line))
+	    (%test-comp1body r expr))))
+	(((mac expr) line)
+	 (syntax
+	  (let* ((r (test-runner-get)))
+	    (test-result-alist! r line)
+	    (%test-comp1body r expr)))))))
+  (define-for-syntax (%test-comp2 comp x)
+    (syntax-case (list x (list 'quote (%test-source-line2 x)) comp) ()
+      (((mac tname expected expr) line comp)
+       (syntax
+	(let* ((r (test-runner-get))
+	       (name tname))
+	  (test-result-alist! r (cons (cons 'test-name tname) line))
+	  (%test-comp2body r comp expected expr))))
+      (((mac expected expr) line comp)
+       (syntax
+	(let* ((r (test-runner-get)))
+	  (test-result-alist! r line)
+	  (%test-comp2body r comp expected expr))))))
+  (define-syntax test-eqv
+    (lambda (x) (%test-comp2 (syntax eqv?) x)))
+  (define-syntax test-eq
+    (lambda (x) (%test-comp2 (syntax eq?) x)))
+  (define-syntax test-equal
+    (lambda (x) (%test-comp2 (syntax equal?) x)))
+  (define-syntax test-approximate ;; FIXME - needed for non-Kawa
+    (lambda (x)
+      (syntax-case (list x (list 'quote (%test-source-line2 x))) ()
+      (((mac tname expected expr error) line)
+       (syntax
+	(let* ((r (test-runner-get))
+	       (name tname))
+	  (test-result-alist! r (cons (cons 'test-name tname) line))
+	  (%test-comp2body r (%test-approximimate= error) expected expr))))
+      (((mac expected expr error) line)
+       (syntax
+	(let* ((r (test-runner-get)))
+	  (test-result-alist! r line)
+	  (%test-comp2body r (%test-approximimate= error) expected expr))))))))
+ (else
+  (define-syntax test-end
+    (syntax-rules ()
+      ((test-end)
+       (%test-end #f '()))
+      ((test-end suite-name)
+       (%test-end suite-name '()))))
+  (define-syntax test-assert
+    (syntax-rules ()
+      ((test-assert tname test-expression)
+       (let* ((r (test-runner-get))
+	      (name tname))
+	 (test-result-alist! r '((test-name . tname)))
+	 (%test-comp1body r test-expression)))
+      ((test-assert test-expression)
+       (let* ((r (test-runner-get)))
+	 (test-result-alist! r '())
+	 (%test-comp1body r test-expression)))))
+  (define-syntax %test-comp2
+    (syntax-rules ()
+      ((%test-comp2 comp tname expected expr)
+       (let* ((r (test-runner-get))
+	      (name tname))
+	 (test-result-alist! r (list (cons 'test-name tname)))
+	 (%test-comp2body r comp expected expr)))
+      ((%test-comp2 comp expected expr)
+       (let* ((r (test-runner-get)))
+	 (test-result-alist! r '())
+	 (%test-comp2body r comp expected expr)))))
+  (define-syntax test-equal
+    (syntax-rules ()
+      ((test-equal . rest)
+       (%test-comp2 equal? . rest))))
+  (define-syntax test-eqv
+    (syntax-rules ()
+      ((test-eqv . rest)
+       (%test-comp2 eqv? . rest))))
+  (define-syntax test-eq
+    (syntax-rules ()
+      ((test-eq . rest)
+       (%test-comp2 eq? . rest))))
+  (define-syntax test-approximate
+    (syntax-rules ()
+      ((test-approximate tname expected expr error)
+       (%test-comp2 (%test-approximimate= error) tname expected expr))
+      ((test-approximate expected expr error)
+       (%test-comp2 (%test-approximimate= error) expected expr))))))
+
+(cond-expand
+ (guile
+  (define-syntax %test-error
+    (syntax-rules ()
+      ((%test-error r etype expr)
+       (%test-comp1body r (catch #t (lambda () expr) (lambda (key . args) #t)))))))
+ (mzscheme
+  (define-syntax %test-error
+    (syntax-rules ()
+      ((%test-error r etype expr)
+       (%test-comp1body r (with-handlers (((lambda (h) #t) (lambda (h) #t)))
+					 (let ()
+					   (test-result-set! r 'actual-value expr)
+					   #f)))))))
+ (chicken
+  (define-syntax %test-error
+    (syntax-rules ()
+      ((%test-error r etype expr)
+        (%test-comp1body r (condition-case expr (ex () #t)))))))
+ (kawa
+  (define-syntax %test-error
+    (syntax-rules ()
+      ((%test-error r etype expr)
+       (let ()
+	 (if (%test-on-test-begin r)
+	     (let ((et etype))
+	       (test-result-set! r 'expected-error et)
+	       (%test-on-test-end r
+				  (try-catch
+				   (let ()
+				     (test-result-set! r 'actual-value expr)
+				     #f)
+				   (ex <java.lang.Throwable>
+				       (test-result-set! r 'actual-error ex)
+				       (cond ((and (instance? et <gnu.bytecode.ClassType>)
+						   (gnu.bytecode.ClassType:isSubclass et <java.lang.Throwable>))
+					      (instance? ex et))
+					     (else #t)))))
+	       (%test-report-result))))))))
+ ((and srfi-34 srfi-35)
+  (define-syntax %test-error
+    (syntax-rules ()
+      ((%test-error r etype expr)
+       (%test-comp1body r (guard (ex ((condition-type? etype)
+		   (and (condition? ex) (condition-has-type? ex etype)))
+		  ((procedure? etype)
+		   (etype ex))
+		  ((equal? type #t)
+		   #t)
+		  (else #t))
+	      expr))))))
+ (srfi-34
+  (define-syntax %test-error
+    (syntax-rules ()
+      ((%test-error r etype expr)
+       (%test-comp1body r (guard (ex (else #t)) expr))))))
+ (else
+  (define-syntax %test-error
+    (syntax-rules ()
+      ((%test-error r etype expr)
+       (begin
+	 ((test-runner-on-test-begin r) r)
+	 (test-result-set! r 'result-kind 'skip)
+	 (%test-report-result)))))))
+
+(cond-expand
+ ((or kawa mzscheme)
+
+  (define-syntax test-error
+    (lambda (x)
+      (syntax-case (list x (list 'quote (%test-source-line2 x))) ()
+	(((mac tname etype expr) line)
+	 (syntax
+	  (let* ((r (test-runner-get))
+		 (name tname))
+	    (test-result-alist! r (cons (cons 'test-name tname) line))
+	    (%test-error r etype expr))))
+	(((mac etype expr) line)
+	 (syntax
+	  (let* ((r (test-runner-get)))
+	    (test-result-alist! r line)
+	    (%test-error r etype expr))))
+	(((mac expr) line)
+	 (syntax
+	  (let* ((r (test-runner-get)))
+	    (test-result-alist! r line)
+	    (%test-error r #t expr))))))))
+ (else
+  (define-syntax test-error
+    (syntax-rules ()
+      ((test-error name etype expr)
+       (test-assert name (%test-error etype expr)))
+      ((test-error etype expr)
+       (test-assert (%test-error etype expr)))
+      ((test-error expr)
+       (test-assert (%test-error #t expr)))))))
+
+(define (test-apply first . rest)
+  (if (test-runner? first)
+      (test-with-runner first (apply test-apply rest))
+      (let ((r (test-runner-current)))
+	(if r
+	    (let ((run-list (%test-runner-run-list r)))
+	      (cond ((null? rest)
+		     (%test-runner-run-list! r (reverse! run-list))
+		     (first)) ;; actually apply procedure thunk
+		    (else
+		     (%test-runner-run-list!
+		      r
+		      (if (eq? run-list #t) (list first) (cons first run-list)))
+		     (apply test-apply rest)
+		     (%test-runner-run-list! r run-list))))
+	    (let ((r (test-runner-create)))
+	      (test-with-runner r (apply test-apply first rest))
+	      ((test-runner-on-final r) r))))))
+
+(define-syntax test-with-runner
+  (syntax-rules ()
+    ((test-with-runner runner form ...)
+     (let ((saved-runner (test-runner-current)))
+       (dynamic-wind
+           (lambda () (test-runner-current runner))
+           (lambda () form ...)
+           (lambda () (test-runner-current saved-runner)))))))
+
+;;; Predicates
+
+(define (%test-match-nth n count)
+  (let ((i 0))
+    (lambda (runner)
+      (set! i (+ i 1))
+      (and (>= i n) (< i (+ n count))))))
+
+(define-syntax test-match-nth
+  (syntax-rules ()
+    ((test-match-nth n)
+     (test-match-nth n 1))
+    ((test-match-nth n count)
+     (%test-match-nth n count))))
+
+(define (%test-match-all . pred-list)
+  (lambda (runner)
+    (let ((result #t))
+      (let loop ((l pred-list))
+	(if (null? l)
+	    result
+	    (begin
+	      (if (not ((car l) runner))
+		  (set! result #f))
+	      (loop (cdr l))))))))
+  
+(define-syntax test-match-all
+  (syntax-rules ()
+    ((test-match-all pred ...)
+     (%test-match-all (%test-as-specifier pred) ...))))
+
+(define (%test-match-any . pred-list)
+  (lambda (runner)
+    (let ((result #f))
+      (let loop ((l pred-list))
+	(if (null? l)
+	    result
+	    (begin
+	      (if ((car l) runner)
+		  (set! result #t))
+	      (loop (cdr l))))))))
+  
+(define-syntax test-match-any
+  (syntax-rules ()
+    ((test-match-any pred ...)
+     (%test-match-any (%test-as-specifier pred) ...))))
+
+;; Coerce to a predicate function:
+(define (%test-as-specifier specifier)
+  (cond ((procedure? specifier) specifier)
+	((integer? specifier) (test-match-nth 1 specifier))
+	((string? specifier) (test-match-name specifier))
+	(else
+	 (error "not a valid test specifier"))))
+
+(define-syntax test-skip
+  (syntax-rules ()
+    ((test-skip pred ...)
+     (let ((runner (test-runner-get)))
+       (%test-runner-skip-list! runner
+				  (cons (test-match-all (%test-as-specifier pred)  ...)
+					(%test-runner-skip-list runner)))))))
+
+(define-syntax test-expect-fail
+  (syntax-rules ()
+    ((test-expect-fail pred ...)
+     (let ((runner (test-runner-get)))
+       (%test-runner-fail-list! runner
+				  (cons (test-match-all (%test-as-specifier pred)  ...)
+					(%test-runner-fail-list runner)))))))
+
+(define (test-match-name name)
+  (lambda (runner)
+    (equal? name (test-runner-test-name runner))))
+
+(define (test-read-eval-string string)
+  (let* ((port (open-input-string string))
+	 (form (read port)))
+    (if (eof-object? (read-char port))
+	(eval form)
+	(cond-expand
+	 (srfi-23 (error "(not at eof)"))
+	 (else "error")))))
+
diff --git a/tests/derivations.scm b/tests/derivations.scm
new file mode 100644
index 0000000000..21ec612ee6
--- /dev/null
+++ b/tests/derivations.scm
@@ -0,0 +1,43 @@
+;;; Guix --- Nix package management from Guile.         -*- coding: utf-8 -*-
+;;; Copyright (C) 2012 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This file is part of Guix.
+;;;
+;;; Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+
+(define-module (test-derivations)
+  #:use-module (guix derivations)
+  #:use-module (srfi srfi-26)
+  #:use-module (srfi srfi-64)
+  #:use-module (rnrs io ports))
+
+(test-begin "derivations")
+
+(test-assert "parse & export"
+  (let* ((b1 (call-with-input-file "test.drv" get-bytevector-all))
+         (d1 (read-derivation (open-bytevector-input-port b1)))
+         (b2 (call-with-bytevector-output-port (cut write-derivation d1 <>)))
+         (d2 (read-derivation (open-bytevector-input-port b2))))
+    (and (equal? b1 b2)
+         (equal? d1 d2))))
+
+(test-end)
+
+
+(exit (= (test-runner-fail-count (test-runner-current)) 0))
+
+;;; Local Variables:
+;;; eval: (put 'test-assert 'scheme-indent-function 1)
+;;; End:
diff --git a/tests/test.drv b/tests/test.drv
new file mode 100644
index 0000000000..b7b1100d50
--- /dev/null
+++ b/tests/test.drv
@@ -0,0 +1 @@
+Derive([("out","/nix/store/yd0v41r8kj49xcjric62gk47lss9vdyg-hurd-qemu-test-build","","")],[("/nix/store/2fgw8gkxs1k8hfcsvir3q9wnkifdzs2s-bash-4.2-p20.drv",["out"]),("/nix/store/31n2fn5h1gydqs3a9zm5g40d2f886i7g-gnused-4.2.1-i586-pc-gnu.drv",["out"]),("/nix/store/34y69yzzb9a1v1fmixiqfhip9s57pybf-gnugrep-2.10-i586-pc-gnu.drv",["out"]),("/nix/store/6n80yhr7cwip45w8rccyk4bp7g7zlkwq-gnu-global-user-environment.drv",["out"]),("/nix/store/88ymj8xwrkmadyabbc1z96x4prabkhsx-gnumake-3.82-i586-pc-gnu.drv",["out"]),("/nix/store/8c61y42zw57axxixl0wikq6vszjbf9bw-qemu-kvm-0.15.1.drv",["out"]),("/nix/store/8dd520i02y7pkh5ynm7d5jb2lk0m7wzn-mig-20100512-i586-pc-gnu.drv",["out"]),("/nix/store/b4lcngrsl838jg37yn510g888nlf0f1v-gawk-4.0.0-i586-pc-gnu.drv",["out"]),("/nix/store/c4bq6crxpl4y9wd18fkvn81vj93m9wph-findutils-4.4.2-i586-pc-gnu.drv",["out"]),("/nix/store/dgbh8qzl4rr89jsrlsy382z84lmfwsj1-bzip2-1.0.6-i586-pc-gnu.drv",["out"]),("/nix/store/dsplzdbcqwgi9ybb7pfk5z9w6vxbn48h-diffutils-3.2-i586-pc-gnu.drv",["out"]),("/nix/store/f6d7aw8ji6yx715hr91a5bvlbr8hp818-hurd-tarball-0.drv",["out"]),("/nix/store/i81h625d3f6m8v587hx5mq6z6agkg221-gnused-4.2.1.drv",["out"]),("/nix/store/j3kf9392mxcs81vqnn06p5npb8lz4wn8-vm-run.drv",["out"]),("/nix/store/jqv7c1znv48c4w0vk4lmsczjxy0n0hjd-unionfs-20120313-i586-pc-gnu.drv",["out"]),("/nix/store/k34s0wnr7g7bshs61whzrp1vsg8gxzvq-gnutar-1.26-i586-pc-gnu.drv",["out"]),("/nix/store/m56fidnal30ns3zv7bqsxncnmpbqqymq-gnumach-20120303-i586-pc-gnu.drv",["out"]),("/nix/store/phn4yvgccfqyw6izcjbj1kh7lbxkkz4a-bash-4.2-p20-i586-pc-gnu.drv",["out"]),("/nix/store/q86x3m69wq2inrrgsa28d09aapah3nsq-hurd-0.drv",["out"]),("/nix/store/s79ij8nbf48ib60xdwpgf70jhksga31n-stdenv.drv",["out"]),("/nix/store/shsa80axsaxfkdlzpbw5d9ijgjqlmn05-gcc-wrapper-4.6.3-i586-pc-gnu.drv",["out"]),("/nix/store/x55vzgh17b41g1p1c6wf97pjy5mnww1d-gzip-1.4-i586-pc-gnu.drv",["out"]),("/nix/store/y7s99gdw53gf7d7bzhq9snbpdwjqa1ih-smbfs-2012-03-15-i586-pc-gnu.drv",["out"]),("/nix/store/yjq2plg890za7s16mm08x1jyfzj0q5hz-hurd-qemu-image.drv",["out"]),("/nix/store/yjzyf7ngsk816c2al76yprplnxysiwpz-xz-5.0.3-i586-pc-gnu.drv",["out"])],[],"x86_64-linux","/nix/store/xl3xf36l7mzwnl0fr6wxajhzhnm95ygm-bash-4.2-p20/bin/sh",["-e","/nix/store/yrzi7zsymp1a4hrjz75k4fk32kag4pzl-vm-run"],[("QEMU_OPTS","-m 512"),("buildCommand","echo 'Hey, this operating system works like a charm!'\n              echo \"Let's see if it can rebuild itself...\"\n\n              ( tar xvf \"/nix/store/kck9pjd6y2l1q15384sxywaknfm6b78f-hurd-tarball-0/tarballs/\"*.tar.gz ;\n                cd hurd-* ;\n                export PATH=\"/nix/store/svz656lvxh0li2pndfgdmgr4i48kbrv8-gawk-4.0.0-i586-pc-gnu/bin:$PATH\" ;\n                set -e ;\n                ./configure --without-parted --prefix=\"/host/xchg/out\" ;\n                make                             # sequential build\n              )\n\n              # FIXME: \"make install\" not run because `rm' fails on SMBFS.\n              mkdir /host/xchg/out\n\n              echo $? > /host/xchg/in-vm-exit\n"),("buildInputs",""),("buildNativeInputs",""),("builder","/nix/store/xl3xf36l7mzwnl0fr6wxajhzhnm95ygm-bash-4.2-p20/bin/sh"),("diskImage","/nix/store/2gqgnw6nmh8ksr5l05cqirw3mdcrnf5p-hurd-qemu-image"),("diskImageBuildInputs","/nix/store/laqpxpssky7v039ga4mvk1c3b36r4gf4-gnumach-20120303-i586-pc-gnu /nix/store/9ypm9rs110msqgb8qykzsxgiab2a6rd7-hurd-0 /nix/store/mkcd3692mkd0llswx3cr9ca6vl12nqzk-gnused-4.2.1-i586-pc-gnu /nix/store/z3zw00xy4ik8b8d6qnaqwbkybr0p2m69-gnugrep-2.10-i586-pc-gnu /nix/store/280rn2c6b6gfg9ynl3qs3zxbgrlkg06d-findutils-4.4.2-i586-pc-gnu /nix/store/wmq0mp74p5ksigq7mpl709l1w8685zqs-diffutils-3.2-i586-pc-gnu /nix/store/b4c3gmg90xyyk13kqwz8hqikjyq1vxyd-bash-4.2-p20-i586-pc-gnu /nix/store/hsxib1jm1ksxnlhxsm00zqhfwln3vp5c-gcc-wrapper-4.6.3-i586-pc-gnu /nix/store/zdjgbwh43yl9kq3j6h5ri3bylinkinzl-gnumake-3.82-i586-pc-gnu /nix/store/xb9llifg0hy342rnj96j70lkbvdmf13h-gnutar-1.26-i586-pc-gnu /nix/store/y8cdvni1hqwmzfwm2ija9v2xb6iqflnx-gzip-1.4-i586-pc-gnu /nix/store/7p7gjd7d605sg1z6m2kvg0zqwylqz4z1-bzip2-1.0.6-i586-pc-gnu /nix/store/0b93rb8x7wh439glp6278xzsq0gf0xcd-xz-5.0.3-i586-pc-gnu /nix/store/6ikghbgf3s71ar1rswk3zczsj03ca3pn-mig-20100512-i586-pc-gnu /nix/store/3jqfrl6f69h65bmx7yzc1prk64993929-smbfs-2012-03-15-i586-pc-gnu /nix/store/nqscl1nn75353qcr9qq5v7w58c24gj12-unionfs-20120313-i586-pc-gnu /nix/store/kp99qz7whrpfc7jy3ycssr3gvrbdz8ra-gnu-global-user-environment /nix/store/laqpxpssky7v039ga4mvk1c3b36r4gf4-gnumach-20120303-i586-pc-gnu /nix/store/9ypm9rs110msqgb8qykzsxgiab2a6rd7-hurd-0 /nix/store/3jqfrl6f69h65bmx7yzc1prk64993929-smbfs-2012-03-15-i586-pc-gnu/hurd/smbfs -s 10.0.2.4 -r smb://10.0.2.4/xchg -u root -p '' /nix/store/3jqfrl6f69h65bmx7yzc1prk64993929-smbfs-2012-03-15-i586-pc-gnu/hurd/smbfs -s 10.0.2.4 -r smb://10.0.2.4/store -u root -p ''"),("memSize","512"),("name","hurd-qemu-test-build"),("out","/nix/store/yd0v41r8kj49xcjric62gk47lss9vdyg-hurd-qemu-test-build"),("postVM","cp -prvd xchg/out \"$out\"\n"),("preVM","diskImage=$(pwd)/disk-image.qcow2\norigImage=\"/nix/store/2gqgnw6nmh8ksr5l05cqirw3mdcrnf5p-hurd-qemu-image\"\nif test -d \"$origImage\"; then origImage=\"$origImage/disk-image.qcow2\"; fi\n/nix/store/sxczq7kv8265b41yr03s4c41pklyq0ih-qemu-kvm-0.15.1/bin/qemu-img create -b \"$origImage\" -f qcow2 $diskImage\n\n# XXX: Until the guest's /nix/store is a unionfs of its actual\n# store and the host's one (i.e., when both unionfs and smbfs\n# implement `io_map', so that ld.so can load binaries off them),\n# rewrite store paths.\necho \"$buildCommand\" | \\\n  /nix/store/w5hacn80b04v1f09nkyypc0sd7bhrknb-gnused-4.2.1/bin/sed -r \\\n    -e's|/nix/store/([0-9a-z]{32})-([^ ]+)|/host/store/\\1-\\2|g' \\\n  > xchg/cmd\n\neval \"$postPreVM\"\n"),("propagatedBuildInputs",""),("propagatedBuildNativeInputs",""),("requiredSystemFeatures","kvm"),("stdenv","/nix/store/7c8asx3yfrg5dg1gzhzyq2236zfgibnm-stdenv"),("system","x86_64-linux")])
\ No newline at end of file