treewide: cleanup phases from last commit

The last commit broken Darwin stdenv. We still need to skip some
phases when Apple provides a Makefile that shouldn’t be used.

pkgs/os-specific/darwin/apple-source-releases/CarbonHeaders/default.nix

@@ -1,6 +1,8 @@
 { stdenv, appleDerivation }:
 
 appleDerivation {
+  dontBuild = true;
+
   installPhase = ''
     mkdir -p $out/include
     cp MacTypes.h          $out/include

pkgs/os-specific/darwin/apple-source-releases/architecture/default.nix

@@ -1,12 +1,7 @@
 { stdenv, appleDerivation }:
 
 appleDerivation {
-  postPatch = ''
+  dontBuild = true;
-    substituteInPlace $sourceRoot/Makefile \
-      --replace "/usr/include" "/include" \
-      --replace "/usr/bin/" "" \
-      --replace "/bin/" ""
-  '';
 
   installPhase = ''
     export DSTROOT=$out

pkgs/os-specific/darwin/apple-source-releases/copyfile/default.nix

@@ -1,6 +1,7 @@
 { stdenv, appleDerivation }:
 
 appleDerivation {
+  dontBuild = true;
   installPhase = ''
     mkdir -p $out/include/
     cp copyfile.h $out/include/

pkgs/os-specific/darwin/apple-source-releases/eap8021x/default.nix

@@ -1,6 +1,7 @@
 { stdenv, appleDerivation }:
 
 appleDerivation {
+  dontBuild = true;
   installPhase = ''
     mkdir -p $out/Library/Frameworks/EAP8021X.framework/Headers
 

pkgs/os-specific/darwin/apple-source-releases/libdispatch/default.nix

@@ -1,6 +1,8 @@
 { stdenv, appleDerivation }:
 
 appleDerivation {
+  dontConfigure = true;
+  dontBuild = true;
   installPhase = ''
     mkdir -p $out/include/dispatch $out/include/os