Add tarball output to flake

flake.nix

@@ -29,7 +29,8 @@
       packages = forAllSystems (
         { pkgs }:
         {
-          default =
+          default = self.packages.${pkgs.system}.apiary;
+          apiary =
             let
               src = pkgs.lib.sourceFilesBySuffices ./. [
                 "go.mod"
@@ -80,6 +81,25 @@
                 "embed"
               ];
             };
+
+          tarball =
+            let
+              version = self.packages.${pkgs.system}.apiary.version;
+            in
+            pkgs.stdenv.mkDerivation {
+              name = "apiary-tarballs-${version}";
+              phases = [ "installPhase" ];
+              installPhase = ''
+                mkdir -p $out
+                mkdir apiary
+                cp ${self.packages.${pkgs.system}.apiary}/bin/apiary apiary/apiary-${pkgs.system}-${version}
+                tar cvzf $out/apiary-${pkgs.system}-${version}.tar.gz apiary
+                pushd apiary
+                sha256sum apiary-${pkgs.system}-${version} > apiary-${pkgs.system}-${version}.sha256sum
+                popd
+                cp apiary/apiary-${pkgs.system}-${version}.sha256sum $out
+              '';
+            };
         }
       );
       devShells = forAllSystems (