diff --git a/pkgs/development/compilers/llvm/6/llvm.nix b/pkgs/development/compilers/llvm/6/llvm.nix
index 4d8666a60cbd..f16f3f721379 100644
--- a/pkgs/development/compilers/llvm/6/llvm.nix
+++ b/pkgs/development/compilers/llvm/6/llvm.nix
@@ -28,10 +28,6 @@ let
   shortVersion = with stdenv.lib;
     concatStringsSep "." (take 2 (splitString "." release_version));
 
-  inherit
-    (import ../common.nix { inherit (stdenv) lib; })
-    llvmBackendList;
-
 in stdenv.mkDerivation (rec {
   name = "llvm-${version}";
 
@@ -52,11 +48,16 @@ in stdenv.mkDerivation (rec {
   propagatedBuildInputs = [ ncurses zlib ];
 
   patches = [
-    # fixes tests, included in llvm_7
+    # Patches to fix tests, included in llvm_7
     (fetchpatch {
       url = "https://github.com/llvm-mirror/llvm/commit/737553be0c9c25c497b45a241689994f177d5a5d.patch";
       sha256 = "0hnaxnkx7zy5yg98f1ggv8a9l0r6g19n6ygqsv26masrnlcbccli";
     })
+    (fetchpatch {
+      url = "https://github.com/llvm-mirror/llvm/commit/1c0dd31a7837c3e2f1c4ac14e4d5ac640688bd1f.patch";
+      includes = [ "test/tools/gold/X86/common.ll" ];
+      sha256 = "0fxgrxmfnjx17w3lcq19rk68b2xksh1bynz3ina784kma7hp4wdb";
+    })
   ];
 
   postPatch = optionalString stdenv.isDarwin ''
@@ -94,7 +95,6 @@ in stdenv.mkDerivation (rec {
     "-DLLVM_ENABLE_RTTI=ON"
     "-DLLVM_HOST_TRIPLE=${stdenv.hostPlatform.config}"
     "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.targetPlatform.config}"
-    "-DLLVM_TARGETS_TO_BUILD=${llvmBackendList enableTargets}"
     "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly"
     "-DLLVM_ENABLE_DUMP=ON"
   ] ++ optionals enableSharedLibraries [
diff --git a/pkgs/development/compilers/llvm/7/llvm.nix b/pkgs/development/compilers/llvm/7/llvm.nix
index fa3252718761..50643f233225 100644
--- a/pkgs/development/compilers/llvm/7/llvm.nix
+++ b/pkgs/development/compilers/llvm/7/llvm.nix
@@ -14,9 +14,6 @@
 , debugVersion ? false
 , enableManpages ? false
 , enableSharedLibraries ? true
-# Mesa requires AMDGPU target
-# BPF is used by bcc
-, enableTargets ? [ stdenv.hostPlatform stdenv.targetPlatform "AMDGPU" "BPF" ]
 , enablePFM ? !stdenv.isDarwin
 }:
 
@@ -29,9 +26,6 @@ let
   shortVersion = with stdenv.lib;
     concatStringsSep "." (take 1 (splitString "." release_version));
 
-  inherit
-    (import ../common.nix { inherit (stdenv) lib; })
-    llvmBackendList;
 in stdenv.mkDerivation (rec {
   name = "llvm-${version}";
 
@@ -89,7 +83,6 @@ in stdenv.mkDerivation (rec {
     "-DLLVM_ENABLE_RTTI=ON"
     "-DLLVM_HOST_TRIPLE=${stdenv.hostPlatform.config}"
     "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.targetPlatform.config}"
-    "-DLLVM_TARGETS_TO_BUILD=${llvmBackendList enableTargets}"
     "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly"
     "-DLLVM_ENABLE_DUMP=ON"
   ] ++ optionals enableSharedLibraries [
diff --git a/pkgs/development/compilers/llvm/common.nix b/pkgs/development/compilers/llvm/common.nix
deleted file mode 100644
index 27f48ff3f113..000000000000
--- a/pkgs/development/compilers/llvm/common.nix
+++ /dev/null
@@ -1,20 +0,0 @@
-{ lib }:
-
-rec {
-  llvmBackend = platform:
-    if builtins.typeOf platform == "string" then
-      platform
-    else if platform.parsed.cpu.family == "x86" then
-      "X86"
-    else if platform.parsed.cpu.name == "aarch64" then
-      "AArch64"
-    else if platform.parsed.cpu.family == "arm" then
-      "ARM"
-    else if platform.parsed.cpu.family == "mips" then
-      "Mips"
-    else
-      throw "Unsupported system";
-
-  llvmBackendList = platforms:
-    lib.concatStringsSep ";" (map llvmBackend platforms);
-}