Integrate nix eval jobs into release automation

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+on:
+  pull_request:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  DeterminateCI:
+    uses: DeterminateSystems/ci/.github/workflows/workflow.yml@main
+    permissions:
+      id-token: "write"
+      contents: "read"
+    with:
+      visibility: public
+      runner-map: |
+        {
+          "aarch64-darwin": "namespace-profile-mac-m2-12c28g",
+          "aarch64-linux": "UbuntuLatest32Cores128GArm",
+          "x86_64-linux": "UbuntuLatest32Cores128G"
+        }

flake.nix

@@ -3,7 +3,7 @@
 
   inputs.nixpkgs.url = "https://nixos.org/channels/nixpkgs-unstable/nixexprs.tar.xz";
   inputs.nix = {
-    url = "github:NixOS/nix/2.33-maintenance";
+    url = "github:DeterminateSystems/nix-src/main";
     # We want to control the deps precisely
     flake = false;
   };

src/drv.cc

@@ -21,6 +21,7 @@
 #include <nix/util/json-utils.hh> //NOLINT(misc-include-cleaner)
 #include <nix/util/pos-idx.hh>
 #include <nix/util/util.hh> // for get()
+#include <nix/store/async-path-writer.hh>
 #include <exception>
 #include <map>
 #include <optional>
@@ -203,6 +204,7 @@ Drv::Drv(std::string &attrPath, nix::EvalState &state,
 
     if (canReadDerivation) {
         // We can read the derivation directly for precise information
+        state.asyncPathWriter->waitForPath(packageInfo.requireDrvPath());
         auto drv = localStore->readDerivation(packageInfo.requireDrvPath());
 
         // Use the more precise system from the derivation

src/worker.cc

@@ -154,6 +154,8 @@ auto extractConstituents(nix::EvalState &state, nix::Value *value,
                         [[maybe_unused]]) -> void {},
                     [&](const nix::NixStringContextElem::DrvDeep &drvDeep
                         [[maybe_unused]]) -> void {},
+                    [&](const nix::NixStringContextElem::Path &_
+                        [[maybe_unused]]) -> void {},
                 },
                 ctx.raw);
         }