these 2 derivations will be built:
  /nix/store/4gzkrxpclv60h94wj98v84c67330d3v2-vectorcraft-web-0.18.0-vendor.drv
  /nix/store/d9s97fhpm57zrsyz0400li4pfl0p450y-vectorcraft-web-0.18.0.drv
error: Cannot build '/nix/store/d9s97fhpm57zrsyz0400li4pfl0p450y-vectorcraft-web-0.18.0.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/7xrs56mkghmg4ah9nvyh819nsvas3r87-vectorcraft-web-0.18.0
       Last 21 log lines:
       > Running phase: unpackPhase
       > unpacking source archive /nix/store/qq9ykcsi7khxx7s7qs7lxp3wfxz66skq-source
       > source root is source
       > Executing cargoSetupPostUnpackHook
       > Finished cargoSetupPostUnpackHook
       > Running phase: patchPhase
       > Executing cargoSetupPostPatchHook
       > Validating consistency between /build/source/Cargo.lock and /build/vectorcraft-web-0.18.0-vendor/Cargo.lock
       > Finished cargoSetupPostPatchHook
       > Running phase: updateAutotoolsGnuConfigScriptsPhase
       > Running phase: configurePhase
       > Running phase: buildPhase
       > 2026-10-29T02:07:30.168644Z ERROR error
       > error from build pipeline
       >
       > Caused by:
       >     0: error getting cargo metadata
       >     1: `cargo metadata` exited with an error: error: patch location `https://github.com/storytold/egui.git?rev=6d518fc799681571963842f95b55a6b68431b15a` does not contain packages matching `egui_demo_lib`
       >        help: check `egui_demo_lib` patch definition for `https://github.com/rust-lang/crates.io-index` in `/build/source/Cargo.toml`
       >
       > 2026-10-29T02:07:30.168687Z ERROR error from build pipeline
       For full logs, run:
         nix log /nix/store/d9s97fhpm57zrsyz0400li4pfl0p450y-vectorcraft-web-0.18.0.drv