diff --git a/pkgs/build-support/setup-hooks/prune-libtool-files.sh b/pkgs/build-support/setup-hooks/prune-libtool-files.sh
index d75812e05b60..2413624124f3 100644
--- a/pkgs/build-support/setup-hooks/prune-libtool-files.sh
+++ b/pkgs/build-support/setup-hooks/prune-libtool-files.sh
@@ -16,7 +16,7 @@ _pruneLibtoolFiles() {
     # the "old_library" field for static libraries.  We are processing only
     # those .la files that do not describe static libraries.
     find "$prefix" -type f -name '*.la' \
-         -exec grep -q '^# Generated by libtool' {} \; \
+         -exec grep -q '^# Generated by .*libtool' {} \; \
          -exec grep -q "^old_library=''" {} \; \
          -exec sed -i {} -e "/^dependency_libs='[^']/ c dependency_libs='' #pruned" \;
 }