diff --git a/CMakeLists.txt b/CMakeLists.txt
index 049bb19f1..ac8fab803 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -64,8 +64,8 @@ if(EXISTS "${CMAKE_SOURCE_DIR}/.git")
 elseif(UNIX AND NOT APPLE)
   # Fallback for Ubuntu/Launchpad (extracts Git hash from debian/changelog rather than Git repo)
   # (see https://answers.launchpad.net/launchpad/+question/678556)
-  execute_process(COMMAND sh debian/gitfromlog.sh debian/changelog
-    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+  execute_process(COMMAND sh -c "grep -Po '(?<=-)(([a-z0-9])\\w+)(?=\\+)' -m 1 changelog"
+    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/debian
     OUTPUT_VARIABLE GIT_HASH
     OUTPUT_STRIP_TRAILING_WHITESPACE
   )