diff --git a/pkgs/servers/dns/ncdns/default.nix b/pkgs/servers/dns/ncdns/default.nix
index 15e400ebad5..de28c01474c 100644
--- a/pkgs/servers/dns/ncdns/default.nix
+++ b/pkgs/servers/dns/ncdns/default.nix
@@ -14,7 +14,7 @@ buildGoPackage rec {
     sha256 = "12q5al48mkjhgyk7z5wyklzzrdbcqhwxl79axa4gh9ld75prghbq";
   };
 
-  patches = [ ./fix-tpl-path.nix ];
+  patches = [ ./fix-tpl-path.patch ];
 
   buildInputs = [ libcap ];
 
diff --git a/pkgs/servers/dns/ncdns/fix-tpl-path.nix b/pkgs/servers/dns/ncdns/fix-tpl-path.patch
similarity index 100%
rename from pkgs/servers/dns/ncdns/fix-tpl-path.nix
rename to pkgs/servers/dns/ncdns/fix-tpl-path.patch