diff --git a/pkgs/development/libraries/openmpi/default.nix b/pkgs/development/libraries/openmpi/default.nix
index 121d212b959d..02e782d6ff36 100644
--- a/pkgs/development/libraries/openmpi/default.nix
+++ b/pkgs/development/libraries/openmpi/default.nix
@@ -168,7 +168,7 @@ stdenv.mkDerivation (finalAttrs: {
       substituteInPlace ''${!outputDev}/share/openmpi/mpifort-wrapper-data.txt \
         --replace-fail \
           compiler=gfortran \
-          compiler=${gfortran}/bin/${gfortran.targetPrefix}gfortran
+          compiler=${targetPackages.gfortran}/bin/${targetPackages.gfortran.targetPrefix}gfortran
 
     '';