diff --git a/scripts/prepack.sh b/scripts/prepack.sh
index 2172706..1f8f152 100755
--- a/scripts/prepack.sh
+++ b/scripts/prepack.sh
@@ -41,7 +41,7 @@ mkdir -p "$OUTDIR"
 # Place info about the current commit into the build dir to easily identify releases
 npm ls -depth -1 | head -n 1 | cut -d' ' -f 1 > "$OUTDIR"/release.txt
 date >> "$OUTDIR"/release.txt
-git rev-parse HEAD >> "$OUTDIR"/release.txt
+cp COMMIT "$OUTDIR"/release.txt
 
 # Place a json schema for the file format into the build directory too
 node scripts/generate-file-format-schema-json.js > "$OUTDIR"/file-format-schema.json