* gnu/packages/crates-io.scm (rust-demo-hack-impl-0.0)[arguments]: Don't skip build. Replace rust-quote-1.0 with 0.6 in cargo-inputs.
* gnu/packages/crates-io.scm (rust-demo-hack-impl-0.0)[arguments]: Don't skip build. Replace rust-quote-1.0 with 0.6 in cargo-inputs.