diff --git a/pkgs/development/compilers/llvm/13/llvm/default.nix b/pkgs/development/compilers/llvm/13/llvm/default.nix
index a15bcc872a6d..957f29e44994 100644
--- a/pkgs/development/compilers/llvm/13/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/13/llvm/default.nix
@@ -46,7 +46,8 @@ in stdenv.mkDerivation (rec {
   buildInputs = [ libxml2 libffi ]
     ++ optional enablePFM libpfm; # exegesis
 
-  propagatedBuildInputs = [ ncurses zlib ];
+  propagatedBuildInputs = optionals (stdenv.hostPlatform == stdenv.buildPlatform) [ ncurses ]
+    ++ [ zlib ];
 
   checkInputs = [ which ];