diff --git a/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix b/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
index 16ed52ea81e7..cabac19ba867 100644
--- a/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
+++ b/pkgs/os-specific/darwin/xcode/sdk-pkgs.nix
@@ -14,12 +14,6 @@ let
 
 minSdkVersion = targetPlatform.minSdkVersion or "9.0";
 
-iosPlatformArch = { parsed, ... }: {
-  armv7a  = "armv7";
-  aarch64 = "arm64";
-  x86_64  = "x86_64";
-}.${parsed.cpu.name};
-
 in
 
 rec {
@@ -35,9 +29,7 @@ rec {
   binutils = wrapBintoolsWith {
     libc = targetIosSdkPkgs.libraries;
     bintools = binutils-unwrapped;
-    extraBuildCommands = ''
-      echo "-arch ${iosPlatformArch targetPlatform}" >> $out/nix-support/libc-ldflags
-    '' + lib.optionalString (sdk.platform == "iPhoneSimulator") ''
+    extraBuildCommands = lib.optionalString (sdk.platform == "iPhoneSimulator") ''
       echo "-platform_version ios-sim ${minSdkVersion} ${sdk.version}" >> $out/nix-support/libc-ldflags
     '' + lib.optionalString (sdk.platform == "iPhoneOS") ''
       echo "-platform_version ios ${minSdkVersion} ${sdk.version}" >> $out/nix-support/libc-ldflags
@@ -52,7 +44,7 @@ rec {
     extraBuildCommands = ''
       tr '\n' ' ' < $out/nix-support/cc-cflags > cc-cflags.tmp
       mv cc-cflags.tmp $out/nix-support/cc-cflags
-      echo "-target ${targetPlatform.config} -arch ${iosPlatformArch targetPlatform}" >> $out/nix-support/cc-cflags
+      echo "-target ${targetPlatform.config}" >> $out/nix-support/cc-cflags
       echo "-isystem ${sdk}/usr/include${lib.optionalString (lib.versionAtLeast "10" sdk.version) " -isystem ${sdk}/usr/include/c++/4.2.1/ -stdlib=libstdc++"}" >> $out/nix-support/cc-cflags
     '' + lib.optionalString (sdk.platform == "iPhoneSimulator") ''
       echo "-mios-simulator-version-min=${minSdkVersion}" >> $out/nix-support/cc-cflags