deliantra-server: remove stdenv overrides

pkgs/games/deliantra/0003-swap.patch

@@ -0,0 +1,14 @@
+--- a/include/util.h
++++ b/include/util.h
+@@ -449,6 +449,11 @@ struct slice_allocator
+   {
+     p->~Tp ();
+   }
++
++  bool operator ==(const slice_allocator &) const
++  {
++    return true;
++  }
+ };
+ 
+ // basically a memory area, but refcounted

pkgs/games/deliantra/server.nix

@@ -35,8 +35,11 @@ stdenv.mkDerivation rec {
   patches = [
     ./0001-abs.patch
     ./0002-datadir.patch
+    ./0003-swap.patch
   ];
 
+  env.CXXFLAGS = "-std=c++11";
+
   postFixup = ''
     wrapProgram $out/bin/cfutil --prefix PERL5LIB : $PERL5LIB
     wrapProgram $out/bin/deliantra-server --prefix PERL5LIB : $PERL5LIB

pkgs/top-level/all-packages.nix

@@ -37676,20 +37676,13 @@ with pkgs;
   darkplaces = callPackage ../games/darkplaces { };
 
   deliantra-server = callPackage ../games/deliantra/server.nix {
-    stdenv = gcc10StdenvCompat;
     # perl538 defines 'struct object' in sv.h. many conflicts result
     perl = perl536;
     perlPackages = perl536Packages;
   };
-  deliantra-arch = callPackage ../games/deliantra/arch.nix {
-    stdenv = gcc10StdenvCompat;
-  };
-  deliantra-maps = callPackage ../games/deliantra/maps.nix {
-    stdenv = gcc10StdenvCompat;
-  };
-  deliantra-data = callPackage ../games/deliantra/data.nix {
-    stdenv = gcc10StdenvCompat;
-  };
+  deliantra-arch = callPackage ../games/deliantra/arch.nix { };
+  deliantra-maps = callPackage ../games/deliantra/maps.nix { };
+  deliantra-data = callPackage ../games/deliantra/data.nix { };
 
   ddnet = callPackage ../games/ddnet {
     inherit (darwin.apple_sdk.frameworks) Carbon Cocoa OpenGL Security;