diff --git a/pkgs/development/compilers/ghc/8.10.7.nix b/pkgs/development/compilers/ghc/8.10.7.nix
index fd14501097c2..cdf4faf3ffc7 100644
--- a/pkgs/development/compilers/ghc/8.10.7.nix
+++ b/pkgs/development/compilers/ghc/8.10.7.nix
@@ -212,7 +212,7 @@ stdenv.mkDerivation (rec {
       url = "https://gitlab.haskell.org/ghc/ghc/-/commit/97d0b0a367e4c6a52a17c3299439ac7de129da24.patch";
       sha256 = "0r4zjj0bv1x1m2dgxp3adsf2xkr94fjnyj1igsivd9ilbs5ja0b5";
     })
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
 
     # Prevent the paths module from emitting symbols that we don't use
     # when building with separate outputs.
diff --git a/pkgs/development/compilers/ghc/9.0.2.nix b/pkgs/development/compilers/ghc/9.0.2.nix
index 1f94dd3bbde2..a4cefe7294d8 100644
--- a/pkgs/development/compilers/ghc/9.0.2.nix
+++ b/pkgs/development/compilers/ghc/9.0.2.nix
@@ -192,7 +192,7 @@ stdenv.mkDerivation (rec {
       url = "https://gitlab.haskell.org/ghc/ghc/-/commit/c6132c782d974a7701e7f6447bdcd2bf6db4299a.patch?merge_request_iid=7423";
       sha256 = "sha256-b4feGZIaKDj/UKjWTNY6/jH4s2iate0wAgMxG3rAbZI=";
     })
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
 
     # Prevent the paths module from emitting symbols that we don't use
     # when building with separate outputs.