From c7d656214f40ba168a8cb0c857e9dd54302eb59a Mon Sep 17 00:00:00 2001
From: Varun Narravula <varun@snare.dev>
Date: Wed, 3 Dec 2025 15:50:36 -0800
Subject: [PATCH] fix(nix): replace version string sub with ldflags, use
 gitignore on src

---
 flake.nix | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/flake.nix b/flake.nix
index f87ca0b..19301a4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -25,22 +25,21 @@
 
           # Update version when releasing
           version = "1.4.2";
-
-          # Update the version in a new source tree
-          srcWithReplacedVersion = pkgs.runCommand "newt-src-with-version" { } ''
-            cp -r ${./.} $out
-            chmod -R +w $out
-            rm -rf $out/.git $out/result $out/.envrc $out/.direnv
-            sed -i "s/version_replaceme/${version}/g" $out/main.go
-          '';
         in
         {
           default = self.packages.${system}.pangolin-newt;
+
           pangolin-newt = pkgs.buildGoModule {
             pname = "pangolin-newt";
-            version = version;
-            src = srcWithReplacedVersion;
+            inherit version;
+            src = pkgs.nix-gitignore.gitignoreSource [ ] ./.;
+
             vendorHash = "sha256-iLUeQ16KLRPdAZT3DCe4eGjlqPrNJJ27BNLtTpeQlC0=";
+
+            ldflags = [
+              "-X main.newtVersion=${version}"
+            ];
+
             meta = with pkgs.lib; {
               description = "A tunneling client for Pangolin";
               homepage = "https://github.com/fosrl/newt";