overlay.nix

(self: super: {
    nodejs-12_x = (super.callPackage <nixpkgs/pkgs/development/web/nodejs/nodejs.nix> {
        libuv = super.libuv.overrideAttrs (oldAttrs: rec {
            version = "1.28.0";
            src = super.fetchFromGitHub {
                owner = "libuv";
                repo = "libuv";
                rev = "v1.28.0";
                sha256 = "0l0gx69sdy3sv3pirjbca2ws54n9d83mj0j96h77k0ncywimvi64";
            };
        });
        openssl = super.openssl_1_1;
    }) {
        version = "12.2.0";
        sha256 = "10vr8yqrvdmcaszg7l7cjchzzik709vcygcnpkjf2sjhz929glf5";
    };
})

shell.nix

let 
    pkgs = import <nixpkgs> { 
        overlays = [
            import ./overlay.nix
        ];
    };
    
in
    pkgs.mkShell {
        nativeBuildInputs = [ pkgs.nodejs-12_x ];
    }