Vars don't work

[larsbergstrom]

r? @edunham

---

This change is

[larsbergstrom]

 (view as text)

./mach build --rel '--target=$BUILD_TARGET'
 in dir /home/servo/buildbot/slave/arm32/build (timeout 1200 secs)
 watching logfiles {}
 argv: ['./mach', 'build', '--rel', '--target=$BUILD_TARGET']
 environment:
  BUILD_TARGET=arm-unknown-linux-gnueabihf
  CARGO_HOME=/home/servo/.cargo
  CC=arm-linux-gnueabihf-gcc
  CCACHE=/usr/bin/ccache
  CXX=arm-linux-gnueabihf-g++
  DISPLAY=:0
  EXPAT_NO_PKG_CONFIG=1
  FONTCONFIG_NO_PKG_CONFIG=1
  FREETYPE2_NO_PKG_CONFIG=1
  HOME=/home/servo
  PATH=/home/servo/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin
  PKG_CONFIG_ALLOW_CROSS=1
  PKG_CONFIG_PATH=/usr/lib/arm-linux-gnueabihf/pkgconfig
  PWD=/home/servo/buildbot/slave/arm32/build
  RUST_BACKTRACE=1
  SERVO_CACHE_DIR=/home/servo/.servo
  SHELL=/bin/bash
  TERM=linux
  UPSTART_INSTANCE=
  UPSTART_JOB=buildbot-slave
 using PTY: False
New python executable in /home/servo/buildbot/slave/arm32/build/python/_virtualenv/bin/python2.7
Also creating executable in /home/servo/buildbot/slave/arm32/build/python/_virtualenv/bin/python
Installing setuptools, pip, wheel...done.
Running virtualenv with interpreter /usr/bin/python2.7
looking for rustc at /home/servo/.servo/rust/2016-03-18/rustc-nightly-x86_64-unknown-linux-gnu/rustc/bin/rustc
Rust compiler already downloaded. Use |bootstrap-rust --force| to download again.
Downloading Host rust library for target $BUILD_TARGET...
Download failed (403): Forbidden - https://static-rust-lang-org.s3.amazonaws.com/dist/2016-03-18/rust-std-nightly-$BUILD_TARGET.tar.gz
program finished with exit code 1
elapsedTime=4.468357

[edunham]

r+

[edunham]

Everything but the macs has succeeded, and this change is irrelevant to mac results. Impatiently merging.