diff --git a/src/version.cmake b/src/version.cmake
index 9bc0131c..828330d4 100644
--- a/src/version.cmake
+++ b/src/version.cmake
@@ -4,8 +4,7 @@ if(RET)
     set(VERSION "${COMMIT}")
     configure_file("src/version.h.in" "${TO}")
 else()
-    string(REGEX MATCH "([0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f])?(-dirty)? $" COMMIT "${DESCRIPTION} ")
-    string(STRIP "${COMMIT}" COMMIT)
-    set(VERSION "${COMMIT}")
+    string(REGEX MATCH "[^0-9a-f]([0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f])[0-9a-f]*(-dirty)?" STUB_VAR "${DESCRIPTION}")
+    set(VERSION "${CMAKE_MATCH_1}${CMAKE_MATCH_2}")
     configure_file("src/version.h.in" "${TO}")
-endif()
\ No newline at end of file
+endif()