step-kms-plugin: fix broken status on darwin

pkgs/by-name/st/step-kms-plugin/package.nix

@@ -42,13 +42,13 @@ buildGoModule rec {
     "-X github.com/smallstep/step-kms-plugin/cmd.Version=${version}"
   ];
 
+  CGO_CFLAGS = "-I${lib.getDev pcsclite}/include/PCSC/";
+
   meta = with lib; {
     description = "Step plugin to manage keys and certificates on cloud KMSs and HSMs";
     homepage = "https://smallstep.com/cli/";
     license = licenses.asl20;
     maintainers = with maintainers; [ qbit ];
     mainProgram = "step-kms-plugin";
-    # can't find pcsclite header files
-    broken = stdenv.hostPlatform.isDarwin;
   };
 }