diff --git a/debian/patches/01-build.patch b/debian/patches/01-build.patch
index f09ff81..35b0bad 100644
--- a/debian/patches/01-build.patch
+++ b/debian/patches/01-build.patch
@@ -7,7 +7,7 @@ diff -Naurp clzip.orig/configure clzip/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 ] &&