Remove gcc from tampi *buildInputs

pkgs/ovni/default.nix

@@ -13,8 +13,6 @@
 , useMpi ? (stdenv.buildPlatform.canExecute stdenv.hostPlatform)
 }:
 
-with lib;
-
 let
   release = rec {
     version = "1.12.0";
@@ -45,8 +43,7 @@ in
     postPatch = ''
       patchShebangs --build test/
     '';
-    nativeBuildInputs = [ cmake ];
+    nativeBuildInputs = [ cmake ] ++ lib.optionals (useMpi) [ mpi ];
-    buildInputs = lib.optionals (useMpi) [ mpi ];
     cmakeBuildType = if (enableDebug) then "Debug" else "Release";
     cmakeFlags = [
       "-DOVNI_GIT_COMMIT=${src.shortRev}"

pkgs/tampi/default.nix

@@ -8,7 +8,6 @@
 , gnumake
 , boost
 , mpi
-, gcc
 , autoreconfHook
 , enableOvni ? true
 , ovni ? null
@@ -51,7 +50,6 @@ in stdenv.mkDerivation {
     autoconf
     automake
     autoreconfHook
-    gcc
     gnumake
     libtool
   ];