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-rw-r--r--tools/nixery/server/builder/builder.go7
1 files changed, 6 insertions, 1 deletions
diff --git a/tools/nixery/server/builder/builder.go b/tools/nixery/server/builder/builder.go
index ddfd4a078229..87776735f9e7 100644
--- a/tools/nixery/server/builder/builder.go
+++ b/tools/nixery/server/builder/builder.go
@@ -63,7 +63,10 @@ type Image struct {
 	Packages []string
 }
 
-// TODO(tazjin): docstring
+// BuildResult represents the data returned from the server to the
+// HTTP handlers. Error information is propagated straight from Nix
+// for errors inside of the build that should be fed back to the
+// client (such as missing packages).
 type BuildResult struct {
 	Error    string          `json:"error"`
 	Pkgs     []string        `json:"pkgs"`
@@ -382,6 +385,8 @@ func BuildImage(ctx context.Context, s *State, image *Image) (*BuildResult, erro
 		return nil, err
 	}
 
+	layerResult[imageResult.SymlinkLayer.SHA256] = imageResult.SymlinkLayer.Path
+
 	layers := []manifest.Entry{}
 	for key, path := range layerResult {
 		f, err := os.Open(path)