Log Message:
Not MAKE_JOBS_SAFE; I got
OSError: [Errno 2] No such file or directory: \ 
'[...]/work/.home/.cache/g-ir-scanner/058d13a6d877030b8adb448928d5630d364836c5'
with 8 jobs on try 1; try 2 without changes succeeded.

This probably applies to the whole plugin framework and should go in
Makefile.common, but let's be conservative about it.