diff --git a/pkgs/development/compilers/llvm/3.6/clang/default.nix b/pkgs/development/compilers/llvm/3.6/clang/default.nix
index 2827e0739030..ff0f34391af0 100644
--- a/pkgs/development/compilers/llvm/3.6/clang/default.nix
+++ b/pkgs/development/compilers/llvm/3.6/clang/default.nix
@@ -2,54 +2,56 @@
 
 let
   gcc = if stdenv.cc.isGNU then stdenv.cc.cc else stdenv.cc.cc.gcc;
-in stdenv.mkDerivation {
-  name = "clang-${version}";
+  self = stdenv.mkDerivation {
+    name = "clang-${version}";
 
-  unpackPhase = ''
-    unpackFile ${fetch "cfe" "1wwr8s6lzr324hv4s1k6na4j5zv6n9kdhi14s4kb9b13d93814df"}
-    mv cfe-${version}.src clang
-    sourceRoot=$PWD/clang
-    unpackFile ${clang-tools-extra_src}
-    mv clang-tools-extra-* $sourceRoot/tools/extra
-  '';
+    unpackPhase = ''
+      unpackFile ${fetch "cfe" "1wwr8s6lzr324hv4s1k6na4j5zv6n9kdhi14s4kb9b13d93814df"}
+      mv cfe-${version}.src clang
+      sourceRoot=$PWD/clang
+      unpackFile ${clang-tools-extra_src}
+      mv clang-tools-extra-* $sourceRoot/tools/extra
+    '';
 
-  buildInputs = [ cmake libedit libxml2 llvm ];
+    buildInputs = [ cmake libedit libxml2 llvm ];
 
-  cmakeFlags = [
-    "-DCMAKE_BUILD_TYPE=Release"
-    "-DCMAKE_CXX_FLAGS=-std=c++11"
-  ] ++
-  # Maybe with compiler-rt this won't be needed?
-  (stdenv.lib.optional stdenv.isLinux "-DGCC_INSTALL_PREFIX=${gcc}") ++
-  (stdenv.lib.optional (stdenv.cc.libc != null) "-DC_INCLUDE_DIRS=${stdenv.cc.libc}/include");
+    cmakeFlags = [
+      "-DCMAKE_BUILD_TYPE=Release"
+      "-DCMAKE_CXX_FLAGS=-std=c++11"
+    ] ++
+    # Maybe with compiler-rt this won't be needed?
+    (stdenv.lib.optional stdenv.isLinux "-DGCC_INSTALL_PREFIX=${gcc}") ++
+    (stdenv.lib.optional (stdenv.cc.libc != null) "-DC_INCLUDE_DIRS=${stdenv.cc.libc}/include");
 
-  patches = [ ./purity.patch ./cmake-exports.patch ];
+    patches = [ ./purity.patch ./cmake-exports.patch ];
 
-  postPatch = ''
-    sed -i -e 's/Args.hasArg(options::OPT_nostdlibinc)/true/' lib/Driver/Tools.cpp
-    sed -i -e 's/DriverArgs.hasArg(options::OPT_nostdlibinc)/true/' lib/Driver/ToolChains.cpp
-  '';
+    postPatch = ''
+      sed -i -e 's/Args.hasArg(options::OPT_nostdlibinc)/true/' lib/Driver/Tools.cpp
+      sed -i -e 's/DriverArgs.hasArg(options::OPT_nostdlibinc)/true/' lib/Driver/ToolChains.cpp
+    '';
 
-  # Clang expects to find LLVMgold in its own prefix
-  # Clang expects to find sanitizer libraries in its own prefix
-  postInstall = ''
-    ln -sv ${llvm}/lib/LLVMgold.so $out/lib
-    ln -sv ${llvm}/lib/clang/${version}/lib $out/lib/clang/${version}/
-    ln -sv $out/bin/clang $out/bin/cpp
-  '';
+    # Clang expects to find LLVMgold in its own prefix
+    # Clang expects to find sanitizer libraries in its own prefix
+    postInstall = ''
+      ln -sv ${llvm}/lib/LLVMgold.so $out/lib
+      ln -sv ${llvm}/lib/clang/${version}/lib $out/lib/clang/${version}/
+      ln -sv $out/bin/clang $out/bin/cpp
+    '';
 
-  enableParallelBuilding = true;
+    enableParallelBuilding = true;
 
-  passthru = {
-    isClang = true;
-  } // stdenv.lib.optionalAttrs stdenv.isLinux {
-    inherit gcc;
+    passthru = {
+      lib = self; # compatibility with gcc, so that `stdenv.cc.cc.lib` works on both
+      isClang = true;
+    } // stdenv.lib.optionalAttrs stdenv.isLinux {
+      inherit gcc;
+    };
+
+    meta = {
+      description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
+      homepage    = http://llvm.org/;
+      license     = stdenv.lib.licenses.bsd3;
+      platforms   = stdenv.lib.platforms.all;
+    };
   };
-
-  meta = {
-    description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-    homepage    = http://llvm.org/;
-    license     = stdenv.lib.licenses.bsd3;
-    platforms   = stdenv.lib.platforms.all;
-  };
-}
+in self
diff --git a/pkgs/development/compilers/llvm/3.7/clang/default.nix b/pkgs/development/compilers/llvm/3.7/clang/default.nix
index e6369b1167e7..aa71bb68553a 100644
--- a/pkgs/development/compilers/llvm/3.7/clang/default.nix
+++ b/pkgs/development/compilers/llvm/3.7/clang/default.nix
@@ -2,54 +2,56 @@
 
 let
   gcc = if stdenv.cc.isGNU then stdenv.cc.cc else stdenv.cc.cc.gcc;
-in stdenv.mkDerivation {
-  name = "clang-${version}";
+  self = stdenv.mkDerivation {
+    name = "clang-${version}";
 
-  unpackPhase = ''
-    unpackFile ${fetch "cfe" "0x065d0w9b51xvdjxwfzjxng0gzpbx45fgiaxpap45ragi61dqjn"}
-    mv cfe-${version}.src clang
-    sourceRoot=$PWD/clang
-    unpackFile ${clang-tools-extra_src}
-    mv clang-tools-extra-* $sourceRoot/tools/extra
-  '';
+    unpackPhase = ''
+      unpackFile ${fetch "cfe" "0x065d0w9b51xvdjxwfzjxng0gzpbx45fgiaxpap45ragi61dqjn"}
+      mv cfe-${version}.src clang
+      sourceRoot=$PWD/clang
+      unpackFile ${clang-tools-extra_src}
+      mv clang-tools-extra-* $sourceRoot/tools/extra
+    '';
 
-  buildInputs = [ cmake libedit libxml2 llvm ];
+    buildInputs = [ cmake libedit libxml2 llvm ];
 
-  cmakeFlags = [
-    "-DCMAKE_BUILD_TYPE=Release"
-    "-DCMAKE_CXX_FLAGS=-std=c++11"
-  ] ++
-  # Maybe with compiler-rt this won't be needed?
-  (stdenv.lib.optional stdenv.isLinux "-DGCC_INSTALL_PREFIX=${gcc}") ++
-  (stdenv.lib.optional (stdenv.cc.libc != null) "-DC_INCLUDE_DIRS=${stdenv.cc.libc}/include");
+    cmakeFlags = [
+      "-DCMAKE_BUILD_TYPE=Release"
+      "-DCMAKE_CXX_FLAGS=-std=c++11"
+    ] ++
+    # Maybe with compiler-rt this won't be needed?
+    (stdenv.lib.optional stdenv.isLinux "-DGCC_INSTALL_PREFIX=${gcc}") ++
+    (stdenv.lib.optional (stdenv.cc.libc != null) "-DC_INCLUDE_DIRS=${stdenv.cc.libc}/include");
 
-  patches = [ ./purity.patch ];
+    patches = [ ./purity.patch ];
 
-  postPatch = ''
-    sed -i -e 's/Args.hasArg(options::OPT_nostdlibinc)/true/' lib/Driver/Tools.cpp
-    sed -i -e 's/DriverArgs.hasArg(options::OPT_nostdlibinc)/true/' lib/Driver/ToolChains.cpp
-  '';
+    postPatch = ''
+      sed -i -e 's/Args.hasArg(options::OPT_nostdlibinc)/true/' lib/Driver/Tools.cpp
+      sed -i -e 's/DriverArgs.hasArg(options::OPT_nostdlibinc)/true/' lib/Driver/ToolChains.cpp
+    '';
 
-  # Clang expects to find LLVMgold in its own prefix
-  # Clang expects to find sanitizer libraries in its own prefix
-  postInstall = ''
-    ln -sv ${llvm}/lib/LLVMgold.so $out/lib
-    ln -sv ${llvm}/lib/clang/${version}/lib $out/lib/clang/${version}/
-    ln -sv $out/bin/clang $out/bin/cpp
-  '';
+    # Clang expects to find LLVMgold in its own prefix
+    # Clang expects to find sanitizer libraries in its own prefix
+    postInstall = ''
+      ln -sv ${llvm}/lib/LLVMgold.so $out/lib
+      ln -sv ${llvm}/lib/clang/${version}/lib $out/lib/clang/${version}/
+      ln -sv $out/bin/clang $out/bin/cpp
+    '';
 
-  enableParallelBuilding = true;
+    enableParallelBuilding = true;
 
-  passthru = {
-    isClang = true;
-  } // stdenv.lib.optionalAttrs stdenv.isLinux {
-    inherit gcc;
+    passthru = {
+      lib = self; # compatibility with gcc, so that `stdenv.cc.cc.lib` works on both
+      isClang = true;
+    } // stdenv.lib.optionalAttrs stdenv.isLinux {
+      inherit gcc;
+    };
+
+    meta = {
+      description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
+      homepage    = http://llvm.org/;
+      license     = stdenv.lib.licenses.bsd3;
+      platforms   = stdenv.lib.platforms.all;
+    };
   };
-
-  meta = {
-    description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-    homepage    = http://llvm.org/;
-    license     = stdenv.lib.licenses.bsd3;
-    platforms   = stdenv.lib.platforms.all;
-  };
-}
+in self
diff --git a/pkgs/development/compilers/llvm/3.8/clang/default.nix b/pkgs/development/compilers/llvm/3.8/clang/default.nix
index 047f87c92a93..71420d4cdccd 100644
--- a/pkgs/development/compilers/llvm/3.8/clang/default.nix
+++ b/pkgs/development/compilers/llvm/3.8/clang/default.nix
@@ -2,54 +2,56 @@
 
 let
   gcc = if stdenv.cc.isGNU then stdenv.cc.cc else stdenv.cc.cc.gcc;
-in stdenv.mkDerivation {
-  name = "clang-${version}";
+  self = stdenv.mkDerivation {
+    name = "clang-${version}";
 
-  unpackPhase = ''
-    unpackFile ${fetch "cfe" "1ybcac8hlr9vl3wg8s4v6cp0c0qgqnwprsv85lihbkq3vqv94504"}
-    mv cfe-${version}.src clang
-    sourceRoot=$PWD/clang
-    unpackFile ${clang-tools-extra_src}
-    mv clang-tools-extra-* $sourceRoot/tools/extra
-  '';
+    unpackPhase = ''
+      unpackFile ${fetch "cfe" "1ybcac8hlr9vl3wg8s4v6cp0c0qgqnwprsv85lihbkq3vqv94504"}
+      mv cfe-${version}.src clang
+      sourceRoot=$PWD/clang
+      unpackFile ${clang-tools-extra_src}
+      mv clang-tools-extra-* $sourceRoot/tools/extra
+    '';
 
-  buildInputs = [ cmake libedit libxml2 llvm python ];
+    buildInputs = [ cmake libedit libxml2 llvm python ];
 
-  cmakeFlags = [
-    "-DCMAKE_BUILD_TYPE=Release"
-    "-DCMAKE_CXX_FLAGS=-std=c++11"
-  ] ++
-  # Maybe with compiler-rt this won't be needed?
-  (stdenv.lib.optional stdenv.isLinux "-DGCC_INSTALL_PREFIX=${gcc}") ++
-  (stdenv.lib.optional (stdenv.cc.libc != null) "-DC_INCLUDE_DIRS=${stdenv.cc.libc}/include");
+    cmakeFlags = [
+      "-DCMAKE_BUILD_TYPE=Release"
+      "-DCMAKE_CXX_FLAGS=-std=c++11"
+    ] ++
+    # Maybe with compiler-rt this won't be needed?
+    (stdenv.lib.optional stdenv.isLinux "-DGCC_INSTALL_PREFIX=${gcc}") ++
+    (stdenv.lib.optional (stdenv.cc.libc != null) "-DC_INCLUDE_DIRS=${stdenv.cc.libc}/include");
 
-  patches = [ ./purity.patch ];
+    patches = [ ./purity.patch ];
 
-  postPatch = ''
-    sed -i -e 's/Args.hasArg(options::OPT_nostdlibinc)/true/' lib/Driver/Tools.cpp
-    sed -i -e 's/DriverArgs.hasArg(options::OPT_nostdlibinc)/true/' lib/Driver/ToolChains.cpp
-  '';
+    postPatch = ''
+      sed -i -e 's/Args.hasArg(options::OPT_nostdlibinc)/true/' lib/Driver/Tools.cpp
+      sed -i -e 's/DriverArgs.hasArg(options::OPT_nostdlibinc)/true/' lib/Driver/ToolChains.cpp
+    '';
 
-  # Clang expects to find LLVMgold in its own prefix
-  # Clang expects to find sanitizer libraries in its own prefix
-  postInstall = ''
-    ln -sv ${llvm}/lib/LLVMgold.so $out/lib
-    ln -sv ${llvm}/lib/clang/${version}/lib $out/lib/clang/${version}/
-    ln -sv $out/bin/clang $out/bin/cpp
-  '';
+    # Clang expects to find LLVMgold in its own prefix
+    # Clang expects to find sanitizer libraries in its own prefix
+    postInstall = ''
+      ln -sv ${llvm}/lib/LLVMgold.so $out/lib
+      ln -sv ${llvm}/lib/clang/${version}/lib $out/lib/clang/${version}/
+      ln -sv $out/bin/clang $out/bin/cpp
+    '';
 
-  enableParallelBuilding = true;
+    enableParallelBuilding = true;
 
-  passthru = {
-    isClang = true;
-  } // stdenv.lib.optionalAttrs stdenv.isLinux {
-    inherit gcc;
+    passthru = {
+      lib = self; # compatibility with gcc, so that `stdenv.cc.cc.lib` works on both
+      isClang = true;
+    } // stdenv.lib.optionalAttrs stdenv.isLinux {
+      inherit gcc;
+    };
+
+    meta = {
+      description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
+      homepage    = http://llvm.org/;
+      license     = stdenv.lib.licenses.bsd3;
+      platforms   = stdenv.lib.platforms.all;
+    };
   };
-
-  meta = {
-    description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-    homepage    = http://llvm.org/;
-    license     = stdenv.lib.licenses.bsd3;
-    platforms   = stdenv.lib.platforms.all;
-  };
-}
+in self