From 6976c68158e9c6bb264ca48041da5be1c24521cf Mon Sep 17 00:00:00 2001
From: David Craven <david@craven.ch>
Date: Thu, 15 Dec 2016 05:53:32 +0100
Subject: [PATCH] upstream: Determine archive type correctly.

* guix/upstream.scm (package-update): Take the basename of the uri
  before trying to determine the extension.
---
 guix/upstream.scm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/guix/upstream.scm b/guix/upstream.scm
index 22187311ea..2334c4c0a6 100644
--- a/guix/upstream.scm
+++ b/guix/upstream.scm
@@ -241,7 +241,7 @@ and 'interactive' (default)."
                    ((archive-type)
                     (match (and=> (package-source package) origin-uri)
                       ((? string? uri)
-                       (file-extension uri))
+                       (file-extension (basename uri)))
                       (_
                        "gz")))
                    ((url signature-url)