diff --git a/CMakeLists.txt b/CMakeLists.txt
index efd76d2..f08fc00 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,8 +6,7 @@ set(PROJECT_VERSION "1.6.0")
 find_package(Git)
 if(GIT_FOUND)
     execute_process(
-            COMMAND ${GIT_EXECUTABLE} rev-parse --short HEAD
-            WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+            COMMAND ${GIT_EXECUTABLE} --git-dir ${CMAKE_CURRENT_SOURCE_DIR}/.git rev-parse --short HEAD
             RESULT_VARIABLE GIT_RET
             OUTPUT_VARIABLE GIT_COMMIT
             OUTPUT_STRIP_TRAILING_WHITESPACE