-> Starting building Chromium...
Updating projects from gyp files...
Package gdk-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gdk-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gdk-2.0' found
gyp: Call to 'pkg-config --cflags gdk-2.0' returned exit status 1 while in /build/chromium-dev/src/chromium-53.0.2756.0/build/linux/system.gyp.
==> ERROR: A failure occurred in build().
    Aborting...
==> ERROR: Build failed, check /opt/builder/chroot/builder/build