Fix to avoid Locale issues in non NixOS OS. See https://nixos.wiki/wi…

…ki/Locales

flake.nix

@@ -42,6 +42,7 @@
         defaultPackage = yosys;
         devShell = pkgs.mkShell {
           buildInputs = with pkgs; [ clang bison flex libffi tcl readline python3 llvmPackages.libcxxClang zlib git gtest abc-verifier ];
+          LOCALE_ARCHIVE = "${pkgs.glibcLocales}/lib/locale/locale-archive";
         };
       }
     );