cant build llvm snapshot, no space left on device (build vm)

Hi, im trying to compile the llvm stack from a git snapshot, in order to provide up-to-date mesa builds for radeon and intel.

unfortunatelly , amd64 builds are failing because the build vm doesnt have enough space to handle the entire llvm stack.

See https://launchpadlibrarian.net/174016897/buildlog_ubuntu-trusty-amd64.llvm-toolchain-snapshot_1%3A3.5~svn207246-3~padoka4_FAILEDTOBUILD.txt.gz

the ppa is here: https://launchpad.net/~paulo-miguel-dias/+archive/llvm-snapshot/+packages

is there any way to increase the vm for the amd64 build so i can complete the package generation?

i386 works just fine though, go figure.

thank you in advance