diff --git a/pkgs/stdenv/generic/setup.sh b/pkgs/stdenv/generic/setup.sh
index 81ed1c635e17..b6bca3e1f562 100644
--- a/pkgs/stdenv/generic/setup.sh
+++ b/pkgs/stdenv/generic/setup.sh
@@ -750,7 +750,7 @@ configurePhase() {
 buildPhase() {
     runHook preBuild
 
-    if [[ -z "$makeFlags" && ! ( -n "$makefile" || -e Makefile || -e makefile || -e GNUmakefile[[ ) ]]; then
+    if [[ -z "$makeFlags" && ! ( -n "$makefile" || -e Makefile || -e makefile || -e GNUmakefile ) ]]; then
         echo "no Makefile, doing nothing"
     else
         # See https://github.com/NixOS/nixpkgs/pull/1354#issuecomment-31260409