When a build invoked with --no-build-hook -K --log-file fails, this is the
last output you'll see:

14:01.58 565 compiler warnings present.
mach configuremachphase `configure' failed after 869.5 seconds
note: keeping build directory `/tmp/guix-build-thunderbird-52.2.1.drv-0'
builder for `/gnu/store/n7qma1ypp2px1shd88r736ykjg5dngll-thunderbird-52.2.1.drv' failed with exit code 1
@ build-failed /gnu/store/n7qma1ypp2px1shd88r736ykjg5dngll-thunderbird-52.2.1.drv - 1 builder for `/gnu/store/n7qma1ypp2px1shd88r736ykjg5dngll-thunderbird-52.2.1.drv' failed with exit code 1
guix build: error: build failed: build of `/gnu/store/n7qma1ypp2px1shd88r736ykjg5dngll-thunderbird-52.2.1.drv' failed

As far as I remember from builds I have aborted at the beginning, the
logfile name is displayed when the build process beginns.

In my opinion we should also display them at the end builds (however they end).
If we don't record logs of failed builds, we should start doing that.
-- 
ng0
GnuPG: A88C8ADD129828D7EAC02E52E22F9BBFEE348588
GnuPG: https://n0is.noblogs.org/my-keys
https://www.infotropique.org https://krosos.org