2 files changed, 104 insertions, 0 deletions
diff --git a/os/common/modules/nix/default.nix b/os/common/modules/nix/default.nix
new file mode 100644
index 0000000..bddf978
--- /dev/null
+++ b/os/common/modules/nix/default.nix
@@ -0,0 +1,51 @@
+{
+  config,
+  pkgs,
+  determinate,
+  lib,
+  ...
+}:
+let
+  user = config.global.userdata.name;
+
+  nixWithFix = determinate.inputs.nix.packages.${pkgs.stdenv.system}.nix-everything.override {
+    nix-cli = determinate.inputs.nix.packages.${pkgs.stdenv.system}.nix-cli.overrideAttrs (oldAttrs: {
+      patches = (oldAttrs.patches or [ ]) ++ [
+        ./nix.patch
+      ];
+    });
+  };
+in
+{
+  imports = [ determinate.nixosModules.default ];
+
+  nix = {
+    package = lib.mkForce nixWithFix;
+
+    gc = {
+      automatic = true;
+      dates = "weekly";
+      options = "--delete-older-than 30d";
+    };
+
+    settings = {
+      auto-optimise-store = true;
+      use-xdg-base-directories = true;
+      trusted-users = [ user ];
+
+      experimental-features = [
+        "flakes"
+        "nix-command"
+      ];
+
+      substituters = [
+        "https://nixbin.sinanmohd.com"
+        "https://nix-community.cachix.org"
+      ];
+      trusted-public-keys = [
+        "nixbin.sinanmohd.com:dXV3KDPVrm+cGJ2M1ZmTeQJqFGaEapqiVoWHgYDh03k="
+        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+      ];
+    };
+  };
+}
diff --git a/os/common/modules/nix/nix.patch b/os/common/modules/nix/nix.patch
new file mode 100644
index 0000000..4f565d8
--- /dev/null
+++ b/os/common/modules/nix/nix.patch
@@ -0,0 +1,53 @@
+diff --git a/develop.cc b/develop.cc
+index ed25e655d8f..f78eee59abc 100644
+--- a/develop.cc
++++ b/develop.cc
+@@ -627,13 +627,12 @@ struct CmdDevelop : Common, MixEnvironment
+                     fmt("[ -n \"$PS1\" ] && PS1+=%s;\n", escapeShellArgAlways(developSettings.bashPromptSuffix.get()));
+         }
+ 
+-        writeFull(rcFileFd.get(), script);
+-
+         setEnviron();
+         // prevent garbage collection until shell exits
+         setEnv("NIX_GCROOT", gcroot.c_str());
+ 
+         Path shell = "bash";
++        bool foundInteractive = false;
+ 
+         try {
+             auto state = getEvalState();
+@@ -656,19 +655,17 @@ struct CmdDevelop : Common, MixEnvironment
+                 Strings{"legacyPackages." + settings.thisSystem.get() + "."},
+                 nixpkgsLockFlags);
+ 
+-            bool found = false;
+-
+             for (auto & path : Installable::toStorePathSet(
+                      getEvalStore(), store, Realise::Outputs, OperateOn::Output, {bashInstallable})) {
+                 auto s = store->printStorePath(path) + "/bin/bash";
+                 if (pathExists(s)) {
+                     shell = s;
+-                    found = true;
++                    foundInteractive = true;
+                     break;
+                 }
+             }
+ 
+-            if (!found)
++            if (!foundInteractive)
+                 throw Error("package 'nixpkgs#bashInteractive' does not provide a 'bin/bash'");
+ 
+         } catch (Error &) {
+@@ -678,6 +675,11 @@ struct CmdDevelop : Common, MixEnvironment
+         // Override SHELL with the one chosen for this environment.
+         // This is to make sure the system shell doesn't leak into the build environment.
+         setEnv("SHELL", shell.c_str());
++        // https://github.com/NixOS/nix/issues/5873
++        script += fmt("SHELL=\"%s\"\n", shell);
++        if (foundInteractive)
++            script += fmt("PATH=\"%s${PATH:+:$PATH}\"\n", std::filesystem::path(shell).parent_path());
++        writeFull(rcFileFd.get(), script);
+ 
+ #ifdef _WIN32 // TODO re-enable on Windows
+         throw UnimplementedError("Cannot yet spawn processes on Windows");