pkgs/development/libraries: stdenv.lib -> lib

pkgs/development/libraries/mpich/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, perl, gfortran
+{ lib, stdenv, fetchurl, perl, gfortran
 ,  openssh, hwloc
 } :
 
@@ -28,7 +28,7 @@ stdenv.mkDerivation  rec {
     sed -i 's:CXX="g++":CXX=${stdenv.cc}/bin/g++:' $out/bin/mpicxx
     sed -i 's:FC="gfortran":FC=${gfortran}/bin/gfortran:' $out/bin/mpifort
   ''
-  + stdenv.lib.optionalString (!stdenv.isDarwin) ''
+  + lib.optionalString (!stdenv.isDarwin) ''
     # /tmp/nix-build... ends up in the RPATH, fix it manually
     for entry in $out/bin/mpichversion $out/bin/mpivars; do
       echo "fix rpath: $entry"
@@ -36,7 +36,7 @@ stdenv.mkDerivation  rec {
     done
     '';
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Implementation of the Message Passing Interface (MPI) standard";
 
     longDescription = ''