bump dependencies

default.nix

@@ -1,8 +1,14 @@
-{ pkgs ? import <nixpkgs> { } }:
-pkgs.buildGoModule {
-  pname = "nar-serve";
-  version = "latest";
-  src = pkgs.lib.cleanSource ./.;
-  vendorSha256 = "sha256-+ms40eK/zdDwE3I19hcIkep9aLvpffvwyaNPXlBef2I=";
-  doCheck = false;
+{ system ? builtins.currentSystem
+, nixpkgs ? import <nixpkgs> { inherit system; }
+}:
+{
+  nar-serve = nixpkgs.buildGoModule {
+    pname = "nar-serve";
+    version = "latest";
+    src = nixpkgs.lib.cleanSource ./.;
+    vendorSha256 = "sha256-Rhy8QTBHNOLz91MDsvg2WOmu6A95w5IBTjY4AhvrS7g=";
+    doCheck = false;
+  };
+
+  devShell = import ./shell.nix { inherit nixpkgs; };
 }

flake.nix

@@ -10,17 +10,12 @@
     //
     flake-utils.lib.eachDefaultSystem (system:
       let
-        pkgs = import nixpkgs {
-          inherit system;
-          overlays = [ self.overlay ];
-        };
+        pkgs = nixpkgs.legacyPackages.${system};
       in
       rec {
-        packages.nar-serve = pkgs.nar-serve;
-        defaultPackage = pkgs.nar-serve;
-        apps.nar-serve = flake-utils.lib.mkApp { drv = pkgs.nar-serve; };
-        defaultApp = apps.nar-serve;
-        devShell = import ./shell.nix { inherit pkgs; };
+        packages = import ./. { nixpkgs = pkgs; };
+        defaultPackage = packages.nar-serve;
+        devShell = packages.devShell;
       }
     );
 }

go.mod

@@ -3,9 +3,9 @@ module github.com/numtide/nar-serve
 go 1.14
 
 require (
-	cloud.google.com/go/storage v1.10.0
-	github.com/aws/aws-sdk-go v1.33.13
+	cloud.google.com/go/storage v1.15.0
+	github.com/aws/aws-sdk-go v1.38.52
 	github.com/stretchr/testify v1.6.1
-	github.com/ulikunitz/xz v0.5.7
+	github.com/ulikunitz/xz v0.5.10
 	github.com/urfave/negroni v1.0.0
 )