diff --git a/AboutThisBuild.cmake b/AboutThisBuild.cmake
index 425bd23de..68dea478d 100644
--- a/AboutThisBuild.cmake
+++ b/AboutThisBuild.cmake
@@ -22,11 +22,11 @@ if (REL_INFO_FILE STREQUAL REL_INFO_FILE-NOTFOUND)
         message(STATUS "git command found: ${GIT_CMD}")
     endif ()
 
-    execute_process(COMMAND ${GIT_CMD} -C "${PROJECT_SOURCE_DIR}" symbolic-ref --short -q HEAD OUTPUT_VARIABLE GIT_BRANCH OUTPUT_STRIP_TRAILING_WHITESPACE)
-    execute_process(COMMAND ${GIT_CMD} -C "${PROJECT_SOURCE_DIR}" describe --tags --always OUTPUT_VARIABLE GIT_VERSION_WHOLE OUTPUT_STRIP_TRAILING_WHITESPACE)
+    execute_process(COMMAND ${GIT_CMD} symbolic-ref --short -q HEAD OUTPUT_VARIABLE GIT_BRANCH OUTPUT_STRIP_TRAILING_WHITESPACE WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}")
+    execute_process(COMMAND ${GIT_CMD} describe --tags --always OUTPUT_VARIABLE GIT_VERSION_WHOLE OUTPUT_STRIP_TRAILING_WHITESPACE WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}")
     string(REGEX REPLACE "-g.*" "" GIT_VERSION ${GIT_VERSION_WHOLE})
     string(REPLACE "-" "." GIT_VERSION ${GIT_VERSION})
-    execute_process(COMMAND ${GIT_CMD} -C "${PROJECT_SOURCE_DIR}" rev-parse --verify HEAD OUTPUT_VARIABLE GIT_CHANGESET OUTPUT_STRIP_TRAILING_WHITESPACE)
+    execute_process(COMMAND ${GIT_CMD} rev-parse --verify HEAD OUTPUT_VARIABLE GIT_CHANGESET OUTPUT_STRIP_TRAILING_WHITESPACE WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}")
     string(REGEX REPLACE ".*-(.*)-g.*" "\\1" GIT_TAGDISTANCE ${GIT_VERSION_WHOLE})
     if (NOT DEFINED CACHE_NAME_SUFFIX)
         string(REGEX REPLACE "-.*" "" CACHE_NAME_SUFFIX ${GIT_VERSION_WHOLE})