* gnu/packages/crates-io.scm (rust-cast-0.2): Update to 0.2.7. [arguments]: Don't skip build. [cargo-inputs]: Replace rust-rustc-version-0.2 with 0.4.
* gnu/packages/crates-io.scm (rust-cast-0.2): Update to 0.2.7. [arguments]: Don't skip build. [cargo-inputs]: Replace rust-rustc-version-0.2 with 0.4.