diff --git a/pkgs/development/compilers/llvm/10/default.nix b/pkgs/development/compilers/llvm/10/default.nix
index 909a7ce6d21..e2e78e16d79 100644
--- a/pkgs/development/compilers/llvm/10/default.nix
+++ b/pkgs/development/compilers/llvm/10/default.nix
@@ -18,13 +18,15 @@ let
 
   tools = lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
-    mkExtraBuildCommands = cc: ''
+    mkExtraBuildCommands0 = cc: ''
       rsrc="$out/resource-root"
       mkdir "$rsrc"
       ln -s "${cc.lib}/lib/clang/${release_version}/include" "$rsrc"
+      echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
+    '';
+    mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
       ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
       ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
-      echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
     '';
 
   in {
@@ -147,7 +149,7 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoCompilerRt = wrapCCWith {
+    lldClangNoCompilerRt = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
       bintools = wrapBintoolsWith {
@@ -157,7 +159,7 @@ let
       extraPackages = [ ];
       extraBuildCommands = ''
         echo "-nostartfiles" >> $out/nix-support/cc-cflags
-      '';
+      '' + mkExtraBuildCommands0 cc;
     };
 
   });
diff --git a/pkgs/development/compilers/llvm/11/default.nix b/pkgs/development/compilers/llvm/11/default.nix
index 9d1aa1e77cb..69c6564babe 100644
--- a/pkgs/development/compilers/llvm/11/default.nix
+++ b/pkgs/development/compilers/llvm/11/default.nix
@@ -20,13 +20,15 @@ let
 
   tools = lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
-    mkExtraBuildCommands = cc: ''
+    mkExtraBuildCommands0 = cc: ''
       rsrc="$out/resource-root"
       mkdir "$rsrc"
       ln -s "${cc.lib}/lib/clang/${release_version}/include" "$rsrc"
+      echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
+    '';
+    mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
       ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
       ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
-      echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
     '';
 
   in {
@@ -148,7 +150,7 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoCompilerRt = wrapCCWith {
+    lldClangNoCompilerRt = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
       bintools = wrapBintoolsWith {
@@ -158,7 +160,7 @@ let
       extraPackages = [ ];
       extraBuildCommands = ''
         echo "-nostartfiles" >> $out/nix-support/cc-cflags
-      '';
+      '' + mkExtraBuildCommands0 cc;
     };
 
   });
diff --git a/pkgs/development/compilers/llvm/12/default.nix b/pkgs/development/compilers/llvm/12/default.nix
index 0df54540d2b..ea054107e05 100644
--- a/pkgs/development/compilers/llvm/12/default.nix
+++ b/pkgs/development/compilers/llvm/12/default.nix
@@ -27,13 +27,15 @@ let
 
   tools = lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
-    mkExtraBuildCommands = cc: ''
+    mkExtraBuildCommands0 = cc: ''
       rsrc="$out/resource-root"
       mkdir "$rsrc"
       ln -s "${cc.lib}/lib/clang/${release_version}/include" "$rsrc"
+      echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
+    '';
+    mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
       ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
       ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
-      echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
     '';
 
   in {
@@ -166,7 +168,7 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoCompilerRt = wrapCCWith {
+    lldClangNoCompilerRt = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
       bintools = wrapBintoolsWith {
@@ -176,7 +178,7 @@ let
       extraPackages = [ ];
       extraBuildCommands = ''
         echo "-nostartfiles" >> $out/nix-support/cc-cflags
-      '';
+      '' + mkExtraBuildCommands0 cc;
     };
 
   });
diff --git a/pkgs/development/compilers/llvm/7/default.nix b/pkgs/development/compilers/llvm/7/default.nix
index 6a51f9d4264..7aa3f9099cc 100644
--- a/pkgs/development/compilers/llvm/7/default.nix
+++ b/pkgs/development/compilers/llvm/7/default.nix
@@ -18,13 +18,15 @@ let
 
   tools = lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
-    mkExtraBuildCommands = cc: ''
+    mkExtraBuildCommands0 = cc: ''
       rsrc="$out/resource-root"
       mkdir "$rsrc"
       ln -s "${cc.lib}/lib/clang/${release_version}/include" "$rsrc"
-      ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
       echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
     '';
+    mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
+    '';
 
   in {
 
@@ -147,7 +149,7 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoCompilerRt = wrapCCWith {
+    lldClangNoCompilerRt = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
       bintools = wrapBintoolsWith {
@@ -157,7 +159,7 @@ let
       extraPackages = [ ];
       extraBuildCommands = ''
         echo "-nostartfiles" >> $out/nix-support/cc-cflags
-      '';
+      '' + mkExtraBuildCommands0 cc;
     };
 
   });
diff --git a/pkgs/development/compilers/llvm/8/default.nix b/pkgs/development/compilers/llvm/8/default.nix
index 251f0f8a8e9..bcbbd155e36 100644
--- a/pkgs/development/compilers/llvm/8/default.nix
+++ b/pkgs/development/compilers/llvm/8/default.nix
@@ -18,13 +18,15 @@ let
 
   tools = lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
-    mkExtraBuildCommands = cc: ''
+    mkExtraBuildCommands0 = cc: ''
       rsrc="$out/resource-root"
       mkdir "$rsrc"
       ln -s "${cc.lib}/lib/clang/${release_version}/include" "$rsrc"
-      ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
       echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
     '';
+    mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
+    '';
 
   in {
 
@@ -150,7 +152,7 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoCompilerRt = wrapCCWith {
+    lldClangNoCompilerRt = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
       bintools = wrapBintoolsWith {
@@ -160,7 +162,7 @@ let
       extraPackages = [ ];
       extraBuildCommands = ''
         echo "-nostartfiles" >> $out/nix-support/cc-cflags
-      '';
+      '' + mkExtraBuildCommands0 cc;
     };
 
   });
diff --git a/pkgs/development/compilers/llvm/9/default.nix b/pkgs/development/compilers/llvm/9/default.nix
index c4a55e36094..0660bac137f 100644
--- a/pkgs/development/compilers/llvm/9/default.nix
+++ b/pkgs/development/compilers/llvm/9/default.nix
@@ -18,13 +18,15 @@ let
 
   tools = lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch buildLlvmTools; });
-    mkExtraBuildCommands = cc: ''
+    mkExtraBuildCommands0 = cc: ''
       rsrc="$out/resource-root"
       mkdir "$rsrc"
       ln -s "${cc.lib}/lib/clang/${release_version}/include" "$rsrc"
-      ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
       echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
     '';
+    mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
+      ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
+    '';
 
   in {
 
@@ -150,7 +152,7 @@ let
       '' + mkExtraBuildCommands cc;
     };
 
-    lldClangNoCompilerRt = wrapCCWith {
+    lldClangNoCompilerRt = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = null;
       bintools = wrapBintoolsWith {
@@ -160,7 +162,7 @@ let
       extraPackages = [ ];
       extraBuildCommands = ''
         echo "-nostartfiles" >> $out/nix-support/cc-cflags
-      '';
+      '' + mkExtraBuildCommands0 cc;
     };
 
   });