diff --git a/debian/unpack.sh b/debian/unpack.sh
index b83f6004..26ba3f2d 100644
--- a/debian/unpack.sh
+++ b/debian/unpack.sh
@@ -14,7 +14,7 @@ echo "unpack of $LLVM_ARCHIVE"
 tar Jxf $LLVM_ARCHIVE
 cd llvm-toolchain-${ORIG_VERSION}_$MAJOR_VERSION~+$VERSION/
 
-VER_FOUND=$(grep "LLVM_VERSION_MAJOR " llvm/CMakeLists.txt|awk '{print $2}'|cut -d\) -f1)
+VER_FOUND=$(grep "LLVM_VERSION_MAJOR " cmake/Modules/LLVMVersion.cmake|awk '{print $2}'|cut -d\) -f1)
 if test "${MAJOR_VERSION}" != "$VER_FOUND" -a "${MAJOR_VERSION}.0.0" != "$VER_FOUND" -a "${MAJOR_VERSION}.0.0git" != "$VER_FOUND" -a "${MAJOR_VERSION}git" != "$VER_FOUND"; then
     echo "Mismatch of version"
     echo "Expected $MAJOR_VERSION / Found $VER_FOUND"