diff --git a/pkgs/development/compilers/ghc/common-hadrian.nix b/pkgs/development/compilers/ghc/common-hadrian.nix
index e21e4033b9087..0fe3796c00b7f 100644
--- a/pkgs/development/compilers/ghc/common-hadrian.nix
+++ b/pkgs/development/compilers/ghc/common-hadrian.nix
@@ -72,10 +72,13 @@
       stdenv.targetPlatform.isWindows
       || stdenv.targetPlatform.isGhcjs
       # Before <https://gitlab.haskell.org/ghc/ghc/-/merge_requests/13932>,
-      # we couldn't force hadrian to build terminfo for cross.
+      # we couldn't force hadrian to build terminfo for different triples.
       || (
         lib.versionOlder version "9.15.20250808"
-        && (stdenv.buildPlatform != stdenv.hostPlatform || stdenv.hostPlatform != stdenv.targetPlatform)
+        && (
+          stdenv.buildPlatform.config != stdenv.hostPlatform.config
+          || stdenv.hostPlatform.config != stdenv.targetPlatform.config
+        )
       )
     ),
 
@@ -353,7 +356,9 @@ let
   inherit (stdenv) buildPlatform hostPlatform targetPlatform;
 
   # TODO(@Ericson2314) Make unconditional
-  targetPrefix = lib.optionalString (targetPlatform != hostPlatform) "${targetPlatform.config}-";
+  targetPrefix = lib.optionalString (
+    targetPlatform.config != hostPlatform.config
+  ) "${targetPlatform.config}-";
 
   # TODO(@sternenseemann): there's no stage0:exe:haddock target by default,
   # so haddock isn't available for GHC cross-compilers. Can we fix that?