diff --git a/flake.nix b/flake.nix
index b8091af..9961bbf 100644
--- a/flake.nix
+++ b/flake.nix
@@ -138,6 +138,8 @@
             cp -a target/userland/bundle/. $out/
           '';
           doInstallCargoArtifacts = false;
+          # Preserve upstream source links to build outputs that the snapshot does not contain.
+          dontCheckForBrokenSymlinks = true;
         });
         sausage = craneLib.buildPackage (common // {
           inherit cargoArtifacts;