* gnu/packages/crates-io.scm: (rust-proc-macro2): New variable. (rust-quote): New variable. Signed-off-by: Chris Marusich <cmmarusich@gmail.com>
* gnu/local.mk: (GNU_SYSTEM_MODULES): Add packages/crates-io.scm. * gnu/packages/crates-io.scm: New file, containing unicode-xid. Signed-off-by: Chris Marusich <cmmarusich@gmail.com>