diff --git a/debian/patches/01-build.patch b/debian/patches/01-build.patch
index 19aad72..a3a630b 100644
--- a/debian/patches/01-build.patch
+++ b/debian/patches/01-build.patch
@@ -1,13 +1,13 @@
 Author: Daniel Baumann <daniel.baumann@progress-technologies.net>
 Description: Avoid overwriting build-environment.
 
-diff -Naurp clzip.orig/configure clzip/configure
---- clzip.orig/configure	2012-06-27 16:02:18.168455662 +0200
-+++ clzip/configure	2012-06-29 04:37:06.563567740 +0200
+diff -Naurp lunzip.orig/configure lunzip/configure
+--- lunzip.orig/configure
++++ lunzip/configure
 @@ -23,9 +23,9 @@ datarootdir='$(prefix)/share'
  infodir='$(datarootdir)/info'
  mandir='$(datarootdir)/man'
- CC=
+ CC=gcc
 -CPPFLAGS=
 -CFLAGS='-Wall -W -O2'
 -LDFLAGS=
@@ -15,5 +15,5 @@ diff -Naurp clzip.orig/configure clzip/configure
 +#CFLAGS='-Wall -W -O2'
 +#LDFLAGS=
  
- # Loop over all args
- while [ -n "$1" ] ; do
+ # checking whether we are using GNU C.
+ if [ ! -x /bin/gcc ] &&