diff -NrU5 git-1.8.0.orig/contrib/credential/gnome-keyring/Makefile git-1.8.0/contrib/credential/gnome-keyring/Makefile
--- git-1.8.0.orig/contrib/credential/gnome-keyring/Makefile	2012-11-17 14:45:06.536641381 +0100
+++ git-1.8.0/contrib/credential/gnome-keyring/Makefile	2012-11-17 14:45:40.883442939 +0100
@@ -1,11 +1,11 @@
 MAIN:=git-credential-gnome-keyring
 all:: $(MAIN)
 
-CC = gcc
-RM = rm -f
-CFLAGS = -g -O2 -Wall
+CC ?= gcc
+RM ?= rm -f
+CFLAGS ?= -g -O2 -Wall
 
 -include ../../../config.mak.autogen
 -include ../../../config.mak
 
 INCS:=$(shell pkg-config --cflags gnome-keyring-1)