diff --git a/pkgs/build-support/fetchhg/builder.sh b/pkgs/build-support/fetchhg/builder.sh
index fbdd12b4f055..48ef269c505b 100644
--- a/pkgs/build-support/fetchhg/builder.sh
+++ b/pkgs/build-support/fetchhg/builder.sh
@@ -5,5 +5,6 @@ header "getting $url${tag:+ ($tag)} into $out"
 hg clone ${tag:+-r "$tag"} "$url" "$out"
 
 rm -rf "$out/.hg"
+rm -f "$out/.hg_archival.txt"
 
 stopNest