diff --git a/CITATION.cff b/CITATION.cff
index cc509768..c6497415 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -4,7 +4,7 @@ title: MOPAC
 type: software
 version: 22.1.0
 doi: 10.5281/zenodo.6511958
-date-released: 2023-09-30
+date-released: 2023-09-25
 authors:
   - family-names: Moussa
     given-names: "Jonathan E."
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 79095bb3..0d79af91 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -171,7 +171,9 @@ endif()
 
 # Pass version & commit information to MOPAC's Fortran source
 target_compile_definitions(mopac-core PRIVATE MOPAC_VERSION_FULL="${PROJECT_VERSION}")
-execute_process(COMMAND git rev-parse HEAD OUTPUT_VARIABLE GIT_HASH)
+if(NOT GIT_HASH)
+  execute_process(COMMAND git rev-parse HEAD OUTPUT_VARIABLE GIT_HASH)
+endif()
 if(GIT_HASH)
   string(STRIP ${GIT_HASH} GIT_HASH)
   target_compile_definitions(mopac-core PRIVATE MOPAC_GIT_HASH="${GIT_HASH}")