diff --git a/pkgs/os-specific/darwin/apple-source-releases/libiconv/default.nix b/pkgs/os-specific/darwin/apple-source-releases/libiconv/default.nix
index d9b3dfb7404..a89f9fdf90e 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/libiconv/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/libiconv/default.nix
@@ -1,14 +1,14 @@
-{ stdenv, appleDerivation }:
+{ stdenv, appleDerivation, autoreconfHook }:
 
 appleDerivation {
-  preConfigure = "cd libiconv";
+  postUnpack = "sourceRoot=$sourceRoot/libiconv";
 
   postInstall = ''
     mv $out/lib/libiconv.dylib $out/lib/libiconv-nocharset.dylib
-    install_name_tool -id $out/lib/libiconv-nocharset.dylib $out/lib/libiconv-nocharset.dylib
+    ${stdenv.cc.bintools.targetPrefix}install_name_tool -id $out/lib/libiconv-nocharset.dylib $out/lib/libiconv-nocharset.dylib
 
     # re-export one useless symbol; ld will reject a dylib that only reexports other dylibs
-    echo 'void dont_use_this(){}' | clang -dynamiclib -x c - -current_version 2.4.0 \
+    echo 'void dont_use_this(){}' | ${stdenv.cc.bintools.targetPrefix}clang -dynamiclib -x c - -current_version 2.4.0 \
       -compatibility_version 7.0.0 -current_version 7.0.0 -o $out/lib/libiconv.dylib \
       -Wl,-reexport_library -Wl,$out/lib/libiconv-nocharset.dylib \
       -Wl,-reexport_library -Wl,$out/lib/libcharset.dylib
diff --git a/pkgs/os-specific/darwin/cctools/port.nix b/pkgs/os-specific/darwin/cctools/port.nix
index d8abdc2c6f8..24f21b498aa 100644
--- a/pkgs/os-specific/darwin/cctools/port.nix
+++ b/pkgs/os-specific/darwin/cctools/port.nix
@@ -108,17 +108,15 @@ let
       #  include_next "unistd.h"
       #endif
       EOF
-    '' + stdenv.lib.optionalString (!stdenv.isDarwin) ''
-      sed -i -e 's|clang++|& -I${libcxx}/include/c++/v1|' cctools/autogen.sh
-    '' + stdenv.lib.optionalString useOld ''
+
       cd cctools
+    '' + stdenv.lib.optionalString (!stdenv.isDarwin) ''
+      sed -i -e 's|clang++|& -I${libcxx}/include/c++/v1|' autogen.sh
     '';
 
     # TODO: this builds an ld without support for LLVM's LTO. We need to teach it, but that's rather
     # hairy to handle during bootstrap. Perhaps it could be optional?
-    preConfigure = stdenv.lib.optionalString (!useOld) ''
-      cd cctools
-    '' + ''
+    preConfigure = ''
       sh autogen.sh
     '';