tomlplusplus: enable checks

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>

pkgs/development/libraries/tomlplusplus/default.nix

@@ -1,6 +1,7 @@
 {
   cmake,
   fetchFromGitHub,
+  glibcLocales,
   lib,
   meson,
   ninja,
@@ -28,6 +29,13 @@ stdenv.mkDerivation (finalAttrs: {
     pkg-config
   ];
 
+  checkInputs = [
+    glibcLocales
+  ];
+
+  doCheck = true;
+  mesonFlags = [ "-Dbuild_tests=${lib.boolToString finalAttrs.doCheck}" ];
+
   passthru = {
     updateScript = nix-update-script { };
     tests.pkg-config = testers.hasPkgConfigModules {