This patch has been submitted upstream: https://github.com/smithlabcode/preseq/pull/15

From 65387b0d766e6c06a15cf8d8f9183d9a4ba644bb Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>
Date: Thu, 25 Jun 2015 15:01:53 +0200
Subject: [PATCH] Install to PREFIX

---
 Makefile | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 4d0367a..e334f2f 100644
--- a/preseq-master/Makefile
+++ b/preseq-master/Makefile
@@ -22,6 +22,10 @@ ifndef ROOT
 ROOT = $(shell pwd)
 endif
 
+ifndef PREFIX
+PREFIX = $(ROOT)
+endif
+
 ifndef SMITHLAB_CPP
 SMITHLAB_CPP=$(ROOT)/smithlab_cpp/
 endif
@@ -91,8 +95,8 @@ endif
 	$(CXX) $(CXXFLAGS) -o $@ $^ $(INCLUDEARGS) $(LIBS)
 
 install: $(PROGS)
-	@mkdir -p $(ROOT)/bin
-	@install -m 755 $(PROGS) $(ROOT)/bin
+	@mkdir -p $(PREFIX)/bin
+	@install -m 755 $(PROGS) $(PREFIX)/bin
 
 clean:
 	@-rm -f $(PROGS) *.o *~