diff --git a/debian/patches/0001-build.patch b/debian/patches/0001-build.patch
index 6eff446..592bcbe 100644
--- a/debian/patches/0001-build.patch
+++ b/debian/patches/0001-build.patch
@@ -18,4 +18,4 @@ diff -Naurp clzip.orig/configure clzip/configure
 +#LDFLAGS=
  
  # checking whether we are using GNU C.
- ${CC} --version > /dev/null 2>&1
+ if /bin/sh -c "${CC} --version" > /dev/null 2>&1 ; then true