diff --git a/pkgs/by-name/er/ergoscf/package.nix b/pkgs/by-name/er/ergoscf/package.nix
index 322f6915cae3..de4d74093589 100644
--- a/pkgs/by-name/er/ergoscf/package.nix
+++ b/pkgs/by-name/er/ergoscf/package.nix
@@ -35,13 +35,15 @@ stdenv.mkDerivation (finalAttrs: {
   env = {
     # Required for compilation with gcc-14
     NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
-    LDFLAGS = "-lblas -llapack";
+    LDFLAGS = toString [
+      "-lblas"
+      "-llapack"
+    ];
+    OMP_NUM_THREADS = 2; # required for check phase
   };
 
   enableParallelBuilding = true;
 
-  OMP_NUM_THREADS = 2; # required for check phase
-
   # With "fortify3", there are test failures, such as:
   # Testing cnof CAMB3LYP/6-31G using FMM
   # *** buffer overflow detected ***: terminated