petsc: moved mpiSupport flag to passthru

pkgs/applications/science/math/getdp/default.nix

@@ -1,6 +1,8 @@
 { lib, stdenv, fetchurl, cmake, gfortran, blas, lapack, mpi, petsc, python3 }:
 
-stdenv.mkDerivation rec {
+let
+  mpiSupport = petsc.passthru.mpiSupport;
+in stdenv.mkDerivation rec {
   pname = "getdp";
   version = "3.6.0";
   src = fetchurl {
@@ -8,7 +10,6 @@ stdenv.mkDerivation rec {
     hash = "sha256-nzefwCV+Z9BHDofuTfhR+vhqm3cCSiUT+7cbtn601N8=";
   };
 
-  inherit (petsc) mpiSupport;
   nativeBuildInputs = [ cmake python3 ];
   buildInputs = [ gfortran blas lapack petsc ]
     ++ lib.optional mpiSupport mpi

pkgs/by-name/pe/petsc/package.nix

@@ -36,8 +36,6 @@ stdenv.mkDerivation rec {
     hash = "sha256-dxHa8JUJCN4zRIXMCx7gcvbzFH2SPtkJ377ssIevjgU=";
   };
 
-  inherit mpiSupport;
-
   strictDeps = true;
   nativeBuildInputs = [
     python3
@@ -115,6 +113,10 @@ stdenv.mkDerivation rec {
   doInstallCheck = true;
   installCheckTarget = "check_install";
 
+  passthru = {
+    inherit mpiSupport;
+  };
+
   meta = with lib; {
     description = "Portable Extensible Toolkit for Scientific computation";
     homepage = "https://petsc.org/release/";