chore: use patched Go 1.27.3 toolchain

.github/workflows/main.yml

@@ -52,7 +52,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: actions/setup-go@v7
         with:
-          go-version-file: go.mod
+          go-version: 1.27.3
           # internal/oracle and internal/difftest are their own modules with
           # their own go.sum; actions/setup-go only caches the root one by
           # default.

flake.nix

@@ -1,17 +1,22 @@
 {
-  description = "A Nix-flake-based Go 1.26 development environment";
+  description = "A Nix-flake-based Go 1.27.3 development environment";
 
   inputs = {
     nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.2511";
     nixpkgs-unstable.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1";
 
+    go-tooling = {
+      url = "github:NixOS/nixpkgs/8cec5ef1131078ea76689e84c362b0ed6a1fb6a1";
+      flake = false;
+    };
+
     nur = {
       url = "github:nix-community/NUR";
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
 
-  outputs = { self, nixpkgs, nixpkgs-unstable, nur }:
+  outputs = { self, nixpkgs, nixpkgs-unstable, nur, go-tooling }:
     let
       supportedSystems = [
         "x86_64-linux"
@@ -40,24 +45,29 @@
     {
       devShells = forEachSupportedSystem ({ pkgs, pkgs-unstable, system }:
         let
+          go = go127;
+          go127 = pkgs.callPackage "${go-tooling}/pkgs/development/compilers/go/1.27.nix" {
+            inherit buildGo127Module;
+          };
+          buildGo127Module = pkgs.buildGoModule.override { go = go127; };
+          golangci-lint = pkgs.callPackage "${go-tooling}/pkgs/by-name/go/golangci-lint/package.nix" {
+            inherit buildGo127Module;
+          };
           stablePackages = with pkgs; [
             antlr
             ginkgo
-            go_1_26
             goperf
             gotools
             just
           ];
-          unstablePackages = with pkgs-unstable; [
-            golangci-lint
-          ];
+          goPackages = [ go golangci-lint ];
           otherPackages = [
             pkgs.nur.repos.goreleaser.goreleaser-pro
           ];
         in
         {
           default = pkgs.mkShell {
-            packages = stablePackages ++ unstablePackages ++ otherPackages;
+            packages = stablePackages ++ goPackages ++ otherPackages;
           };
         }
       );

go.mod

@@ -2,6 +2,8 @@ module github.com/formancehq/numscript
 
 go 1.26.0
 
+toolchain go1.27.3
+
 require (
 	github.com/antlr4-go/antlr/v4 v4.13.1
 	github.com/getsentry/sentry-go v0.43.0

internal/difftest/go.mod

@@ -2,6 +2,8 @@ module github.com/formancehq/numscript/internal/difftest
 
 go 1.26.0
 
+toolchain go1.27.3
+
 require (
 	github.com/formancehq/go-libs/v5 v5.6.1
 	github.com/formancehq/numscript v0.0.0-00010101000000-000000000000

internal/oracle/go.mod

@@ -2,6 +2,8 @@ module github.com/formancehq/numscript/internal/oracle
 
 go 1.26.0
 
+toolchain go1.27.3
+
 require (
 	github.com/antlr/antlr4/runtime/Go/antlr v1.4.10
 	github.com/formancehq/go-libs/v5 v5.6.1