diff --git a/debian/patches/0001-build.patch b/debian/patches/0001-build.patch
index fcf8e07..fb463b0 100644
--- a/debian/patches/0001-build.patch
+++ b/debian/patches/0001-build.patch
@@ -4,7 +4,7 @@ Description: Avoid overwriting build-environment.
 diff -Naurp lunzip.orig/configure lunzip/configure
 --- lunzip.orig/configure
 +++ lunzip/configure
-@@ -23,9 +23,9 @@ datarootdir='$(prefix)/share'
+@@ -21,9 +21,9 @@ datarootdir='$(prefix)/share'
  infodir='$(datarootdir)/info'
  mandir='$(datarootdir)/man'
  CC=gcc
@@ -16,4 +16,4 @@ diff -Naurp lunzip.orig/configure lunzip/configure
 +#LDFLAGS=
  
  # checking whether we are using GNU C.
- if [ ! -x /bin/gcc ] &&
+ ${CC} --version > /dev/null 2>&1