diff --git a/pkgs/os-specific/darwin/apple-source-releases/ICU/default.nix b/pkgs/os-specific/darwin/apple-source-releases/ICU/default.nix
index f2dd63cf2de..cdebfe6d2f7 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/ICU/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/ICU/default.nix
@@ -59,7 +59,7 @@ appleDerivation {
 
     "DATA_INSTALL_DIR=/share/icu/"
     "DATA_LOOKUP_DIR=$(DSTROOT)$(DATA_INSTALL_DIR)"
-
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ # darwin* platform properties are only defined on darwin
     # hack to use our lower macos version
     "MAC_OS_X_VERSION_MIN_REQUIRED=${formatVersionNumeric stdenv.hostPlatform.darwinMinVersion}"
     "ICU_TARGET_VERSION=-m${stdenv.hostPlatform.darwinPlatform}-version-min=${stdenv.hostPlatform.darwinMinVersion}"