diff --git a/pkgs/development/compilers/ghc/8.10.7.nix b/pkgs/development/compilers/ghc/8.10.7.nix
index 5be64bebcd4d..98060f864f91 100644
--- a/pkgs/development/compilers/ghc/8.10.7.nix
+++ b/pkgs/development/compilers/ghc/8.10.7.nix
@@ -214,13 +214,10 @@ stdenv.mkDerivation (rec {
   '' + lib.optionalString useLLVM ''
     export LLC="${lib.getBin llvmPackages.llvm}/bin/llc"
     export OPT="${lib.getBin llvmPackages.llvm}/bin/opt"
-  '' + lib.optionalString (targetCC.isClang || (useLLVM && stdenv.targetPlatform.isDarwin)) (let
-    # LLVM backend on Darwin needs clang, if we are already using clang, might as well set the environment variable.
-    # See also https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
-    clang = if targetCC.isClang then targetCC else llvmPackages.clang;
-  in ''
-    export CLANG="${clang}/bin/${clang.targetPrefix}clang"
-  '') + ''
+  '' + lib.optionalString (useLLVM && stdenv.targetPlatform.isDarwin) ''
+    # LLVM backend on Darwin needs clang: https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
+    export CLANG="${llvmPackages.clang}/bin/${llvmPackages.clang.targetPrefix}clang"
+  '' + ''
 
     echo -n "${buildMK}" > mk/build.mk
     sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
diff --git a/pkgs/development/compilers/ghc/8.8.4.nix b/pkgs/development/compilers/ghc/8.8.4.nix
index ffa2c473eec6..f865ce0b2933 100644
--- a/pkgs/development/compilers/ghc/8.8.4.nix
+++ b/pkgs/development/compilers/ghc/8.8.4.nix
@@ -219,13 +219,10 @@ stdenv.mkDerivation (rec {
   '' + lib.optionalString useLLVM ''
     export LLC="${lib.getBin llvmPackages.llvm}/bin/llc"
     export OPT="${lib.getBin llvmPackages.llvm}/bin/opt"
-  '' + lib.optionalString (targetCC.isClang || (useLLVM && stdenv.targetPlatform.isDarwin)) (let
-    # LLVM backend on Darwin needs clang, if we are already using clang, might as well set the environment variable.
-    # See also https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
-    clang = if targetCC.isClang then targetCC else llvmPackages.clang;
-  in ''
-    export CLANG="${clang}/bin/${clang.targetPrefix}clang"
-  '') + ''
+  '' + lib.optionalString (useLLVM && stdenv.targetPlatform.isDarwin) ''
+    # LLVM backend on Darwin needs clang: https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
+    export CLANG="${llvmPackages.clang}/bin/${llvmPackages.clang.targetPrefix}clang"
+  '' + ''
 
     echo -n "${buildMK dontStrip}" > mk/build.mk
     sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
diff --git a/pkgs/development/compilers/ghc/9.0.1.nix b/pkgs/development/compilers/ghc/9.0.1.nix
index d377328692cb..ac319ec130e6 100644
--- a/pkgs/development/compilers/ghc/9.0.1.nix
+++ b/pkgs/development/compilers/ghc/9.0.1.nix
@@ -180,13 +180,10 @@ stdenv.mkDerivation (rec {
   '' + lib.optionalString useLLVM ''
     export LLC="${lib.getBin llvmPackages.llvm}/bin/llc"
     export OPT="${lib.getBin llvmPackages.llvm}/bin/opt"
-  '' + lib.optionalString (targetCC.isClang || (useLLVM && stdenv.targetPlatform.isDarwin)) (let
-    # LLVM backend on Darwin needs clang, if we are already using clang, might as well set the environment variable.
-    # See also https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
-    clang = if targetCC.isClang then targetCC else llvmPackages.clang;
-  in ''
-    export CLANG="${clang}/bin/${clang.targetPrefix}clang"
-  '') + ''
+  '' + lib.optionalString (useLLVM && stdenv.targetPlatform.isDarwin) ''
+    # LLVM backend on Darwin needs clang: https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
+    export CLANG="${llvmPackages.clang}/bin/${llvmPackages.clang.targetPrefix}clang"
+  '' + ''
 
     echo -n "${buildMK}" > mk/build.mk
     sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
diff --git a/pkgs/development/compilers/ghc/9.2.1.nix b/pkgs/development/compilers/ghc/9.2.1.nix
index 20062358db50..23158fe07aec 100644
--- a/pkgs/development/compilers/ghc/9.2.1.nix
+++ b/pkgs/development/compilers/ghc/9.2.1.nix
@@ -180,13 +180,10 @@ stdenv.mkDerivation (rec {
   '' + lib.optionalString useLLVM ''
     export LLC="${lib.getBin llvmPackages.llvm}/bin/llc"
     export OPT="${lib.getBin llvmPackages.llvm}/bin/opt"
-  '' + lib.optionalString (targetCC.isClang || (useLLVM && stdenv.targetPlatform.isDarwin)) (let
-    # LLVM backend on Darwin needs clang, if we are already using clang, might as well set the environment variable.
-    # See also https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
-    clang = if targetCC.isClang then targetCC else llvmPackages.clang;
-  in ''
-    export CLANG="${clang}/bin/${clang.targetPrefix}clang"
-  '') + ''
+  '' + lib.optionalString (useLLVM && stdenv.targetPlatform.isDarwin) ''
+    # LLVM backend on Darwin needs clang: https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
+    export CLANG="${llvmPackages.clang}/bin/${llvmPackages.clang.targetPrefix}clang"
+  '' + ''
 
     echo -n "${buildMK}" > mk/build.mk
     sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
diff --git a/pkgs/development/compilers/ghc/head.nix b/pkgs/development/compilers/ghc/head.nix
index 537b735b4a21..a0ffddf33f11 100644
--- a/pkgs/development/compilers/ghc/head.nix
+++ b/pkgs/development/compilers/ghc/head.nix
@@ -194,13 +194,10 @@ stdenv.mkDerivation (rec {
   '' + lib.optionalString useLLVM ''
     export LLC="${lib.getBin llvmPackages.llvm}/bin/llc"
     export OPT="${lib.getBin llvmPackages.llvm}/bin/opt"
-  '' + lib.optionalString (targetCC.isClang || (useLLVM && stdenv.targetPlatform.isDarwin)) (let
-    # LLVM backend on Darwin needs clang, if we are already using clang, might as well set the environment variable.
-    # See also https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
-    clang = if targetCC.isClang then targetCC else llvmPackages.clang;
-  in ''
-    export CLANG="${clang}/bin/${clang.targetPrefix}clang"
-  '') + ''
+  '' + lib.optionalString (useLLVM && stdenv.targetPlatform.isDarwin) ''
+    # LLVM backend on Darwin needs clang: https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
+    export CLANG="${llvmPackages.clang}/bin/${llvmPackages.clang.targetPrefix}clang"
+  '' + ''
 
     # otherwise haddock fails when generating the compiler docs
     export LANG=C.UTF-8