diff --git a/pkgs/development/compilers/llvm/3.4/lld.nix b/pkgs/development/compilers/llvm/3.4/lld.nix
index c502b0e215e..c1841610f31 100644
--- a/pkgs/development/compilers/llvm/3.4/lld.nix
+++ b/pkgs/development/compilers/llvm/3.4/lld.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetch, cmake, llvm, ncurses, zlib, python, version }:
+{ stdenv, fetch, cmake, llvm, ncurses, zlib, python2, version }:
 
 stdenv.mkDerivation {
   name = "lld-${version}";
@@ -11,7 +11,7 @@ stdenv.mkDerivation {
     export cmakeFlags="$cmakeFlags -DLLD_PATH_TO_LLVM_SOURCE="`ls -d $PWD/llvm-*`
   '';
 
-  buildInputs = [ cmake ncurses zlib python ];
+  buildInputs = [ cmake ncurses zlib python2 ];
 
   cmakeFlags = [
     "-DCMAKE_CXX_FLAGS=-std=c++11"
diff --git a/pkgs/development/compilers/llvm/3.4/lldb.nix b/pkgs/development/compilers/llvm/3.4/lldb.nix
index cd498b5cf51..5d2e9c479ab 100644
--- a/pkgs/development/compilers/llvm/3.4/lldb.nix
+++ b/pkgs/development/compilers/llvm/3.4/lldb.nix
@@ -8,7 +8,7 @@
 , libedit
 , llvm
 , clang
-, python
+, python2
 , version
 }:
 
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
       scripts/Python/build-swig-Python.sh
   '';
 
-  buildInputs = [ cmake python which swig ncurses zlib libedit ];
+  buildInputs = [ cmake python2 which swig ncurses zlib libedit ];
 
   cmakeFlags = [
     "-DCMAKE_CXX_FLAGS=-std=c++11"
diff --git a/pkgs/development/compilers/llvm/3.4/llvm.nix b/pkgs/development/compilers/llvm/3.4/llvm.nix
index 7471974d00a..54346baba0d 100644
--- a/pkgs/development/compilers/llvm/3.4/llvm.nix
+++ b/pkgs/development/compilers/llvm/3.4/llvm.nix
@@ -3,7 +3,7 @@
 , perl
 , groff
 , cmake
-, python
+, python2
 , libffi
 , binutils
 , libxml2
@@ -30,7 +30,7 @@ in stdenv.mkDerivation rec {
 
   buildInputs =
     [ perl groff cmake libxml2 libffi ]
-    ++ stdenv.lib.optional (!stdenv.isDarwin) python /*
+    ++ stdenv.lib.optional (!stdenv.isDarwin) python2 /*
     ++ stdenv.lib.optional stdenv.isLinux valgrind */;
 
   propagatedBuildInputs = [ ncurses zlib ];
diff --git a/pkgs/development/compilers/llvm/3.4/polly.nix b/pkgs/development/compilers/llvm/3.4/polly.nix
index 2fed0fc8abe..3d3483afafa 100644
--- a/pkgs/development/compilers/llvm/3.4/polly.nix
+++ b/pkgs/development/compilers/llvm/3.4/polly.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetch, cmake, isl, python, gmp, llvm, version }:
+{ stdenv, fetch, cmake, isl, python2, gmp, llvm, version }:
 
 stdenv.mkDerivation {
   name = "polly-${version}";
@@ -7,7 +7,7 @@ stdenv.mkDerivation {
 
   patches = [ ./polly-separate-build.patch ];
 
-  buildInputs = [ cmake isl python gmp ];
+  buildInputs = [ cmake isl python2 gmp ];
 
   cmakeFlags = [
     "-DCMAKE_CXX_FLAGS=-std=c++11"