Wrap it in a flake with a great tool.

.gitignore

@@ -2,3 +2,4 @@ upload
 env
 .env
 files
+/gomod2nix-template

default.nix

@@ -0,0 +1,21 @@
+{ pkgs ? (
+    let
+      inherit (builtins) fetchTree fromJSON readFile;
+      inherit ((fromJSON (readFile ./flake.lock)).nodes) nixpkgs gomod2nix;
+    in
+    import (fetchTree nixpkgs.locked) {
+      overlays = [
+        (import "${fetchTree gomod2nix.locked}/overlay.nix")
+      ];
+    }
+  )
+, buildGoApplication ? pkgs.buildGoApplication
+}:
+
+buildGoApplication {
+  pname = "upfast";
+  version = "0.1";
+  pwd = ./.;
+  src = ./.;
+  modules = ./gomod2nix.toml;
+}

flake.lock

@@ -0,0 +1,85 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1709126324,
+        "narHash": "sha256-q6EQdSeUZOG26WelxqkmR7kArjgWCdw5sfJVHPH/7j8=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "d465f4819400de7c8d874d50b982301f28a84605",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "gomod2nix": {
+      "inputs": {
+        "flake-utils": [
+          "flake-utils"
+        ],
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1705314449,
+        "narHash": "sha256-yfQQ67dLejP0FLK76LKHbkzcQqNIrux6MFe32MMFGNQ=",
+        "owner": "nix-community",
+        "repo": "gomod2nix",
+        "rev": "30e3c3a9ec4ac8453282ca7f67fca9e1da12c3e6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "gomod2nix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1709237383,
+        "narHash": "sha256-cy6ArO4k5qTx+l5o+0mL9f5fa86tYUX3ozE1S+Txlds=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "1536926ef5621b09bba54035ae2bb6d806d72ac8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "gomod2nix": "gomod2nix",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,29 @@
+{
+  description = "A basic gomod2nix flake";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+  inputs.gomod2nix.url = "github:nix-community/gomod2nix";
+  inputs.gomod2nix.inputs.nixpkgs.follows = "nixpkgs";
+  inputs.gomod2nix.inputs.flake-utils.follows = "flake-utils";
+
+  outputs = { self, nixpkgs, flake-utils, gomod2nix }:
+    (flake-utils.lib.eachDefaultSystem
+      (system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+
+          # The current default sdk for macOS fails to compile go projects, so we use a newer one for now.
+          # This has no effect on other platforms.
+          callPackage = pkgs.darwin.apple_sdk_11_0.callPackage or pkgs.callPackage;
+        in
+        {
+          packages.default = callPackage ./. {
+            inherit (gomod2nix.legacyPackages.${system}) buildGoApplication;
+          };
+          devShells.default = callPackage ./shell.nix {
+            inherit (gomod2nix.legacyPackages.${system}) mkGoEnv gomod2nix;
+          };
+        })
+    );
+}

gomod2nix.toml

@@ -0,0 +1,39 @@
+schema = 3
+
+[mod]
+  [mod."github.com/golang-jwt/jwt"]
+    version = "v3.2.2+incompatible"
+    hash = "sha256-LOkpuXhWrFayvVf1GOaOmZI5YKEsgqVSb22aF8LnCEM="
+  [mod."github.com/labstack/echo/v4"]
+    version = "v4.11.3"
+    hash = "sha256-rdqH4HQB/vZyEsoymrEsQ8izjf0m7jhrIxbF6r5ZmBo="
+  [mod."github.com/labstack/gommon"]
+    version = "v0.4.0"
+    hash = "sha256-xISAIJEu2xh0hoWsORbgjnz3rDK3ft3hrvmxt0wfHVw="
+  [mod."github.com/mattn/go-colorable"]
+    version = "v0.1.13"
+    hash = "sha256-qb3Qbo0CELGRIzvw7NVM1g/aayaz4Tguppk9MD2/OI8="
+  [mod."github.com/mattn/go-isatty"]
+    version = "v0.0.19"
+    hash = "sha256-wYQqGxeqV3Elkmn26Md8mKZ/viw598R4Ych3vtt72YE="
+  [mod."github.com/valyala/bytebufferpool"]
+    version = "v1.0.0"
+    hash = "sha256-I9FPZ3kCNRB+o0dpMwBnwZ35Fj9+ThvITn8a3Jr8mAY="
+  [mod."github.com/valyala/fasttemplate"]
+    version = "v1.2.2"
+    hash = "sha256-gp+lNXE8zjO+qJDM/YbS6V43HFsYP6PKn4ux1qa5lZ0="
+  [mod."golang.org/x/crypto"]
+    version = "v0.14.0"
+    hash = "sha256-UUSt3X/i34r1K0mU+Y5IzljX5HYy07JcHh39Pm1MU+o="
+  [mod."golang.org/x/net"]
+    version = "v0.17.0"
+    hash = "sha256-qRawHWLSsJ06QNbLhUWPXGVSO1eaioeC9xZlUEWN8J8="
+  [mod."golang.org/x/sys"]
+    version = "v0.13.0"
+    hash = "sha256-/+RDZ0a0oEfJ0k304VqpJpdrl2ZXa3yFlOxy4mjW7w0="
+  [mod."golang.org/x/text"]
+    version = "v0.13.0"
+    hash = "sha256-J34dbc8UNVIdRJUZP7jPt11oxuwG8VvrOOylxE7V3oA="
+  [mod."golang.org/x/time"]
+    version = "v0.3.0"
+    hash = "sha256-/hmc9skIswMYbivxNS7R8A6vCTUF9k2/7tr/ACkcEaM="

shell.nix

@@ -0,0 +1,24 @@
+{ pkgs ? (
+    let
+      inherit (builtins) fetchTree fromJSON readFile;
+      inherit ((fromJSON (readFile ./flake.lock)).nodes) nixpkgs gomod2nix;
+    in
+    import (fetchTree nixpkgs.locked) {
+      overlays = [
+        (import "${fetchTree gomod2nix.locked}/overlay.nix")
+      ];
+    }
+  )
+, mkGoEnv ? pkgs.mkGoEnv
+, gomod2nix ? pkgs.gomod2nix
+}:
+
+let
+  goEnv = mkGoEnv { pwd = ./.; };
+in
+pkgs.mkShell {
+  packages = [
+    goEnv
+    gomod2nix
+  ];
+}