The 'hurd-headers' package now uses a git checkout and added dependencies on
autoconf and automake to build. Using those in commencement creates a
bootstrap loop. So, revert to a tarball release.
* gnu/packages/commencement.scm (hurd-version-boot0, hurd-source-boot0): New
variable.
(hurd-headers-boot0): Use it to build from tarball; remove autoconf, automake,
texinfo bootstrap dependencies.
c9c5e032c3