utf8cpp.diff

diff --git a/pkgs/development/libraries/utf8cpp/default.nix b/pkgs/development/libraries/utf8cpp/default.nix
index f42baa2576a..a2aac1241cd 100644
--- a/pkgs/development/libraries/utf8cpp/default.nix
+++ b/pkgs/development/libraries/utf8cpp/default.nix
@@ -8,17 +8,20 @@ stdenv.mkDerivation rec {
     owner = "nemtrif";
     repo = "utfcpp";
     rev = "v${version}";
-    sha256 = "1d5p9l27mxhsmm4zlxjsbxngsmr5yxrzi66x550bf5g92sj52ffc";
+    fetchSubmodules = true;
+    sha256 = "1s2pda75488z7c3w3a6qv31bj239248696yk5j2a1drbg2x1dpfh";
   };
 
   cmakeFlags = [
     "-DCMAKE_BUILD_TYPE=None"
     "-DCMAKE_INSTALL_LIBDIR=lib"
-    "-DUTF8_TESTS=OFF"
+    "-DINSTALL_GTEST=OFF"
   ];
 
   nativeBuildInputs = [ cmake ];
 
+  doCheck = true;
+
   meta = with stdenv.lib; {
     homepage = "https://github.com/nemtrif/utfcpp";
     description = "UTF-8 with C++ in a Portable Way";