Eric Bavier writes: > bavier pushed a commit to branch core-updates-next > in repository guix. > > commit 5b01b6034aeab32a5011c5757f18bd9772d3497d > Author: Eric Bavier > Date: Thu Nov 1 21:18:41 2018 -0500 > > python: Honor '--cores=...' in tests. > > * gnu/packages/python.scm (python-2.7)[arguments]: Add #:make-flags. > --- > gnu/packages/python.scm | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm > index 2b6a064..46ce0dd 100644 > --- a/gnu/packages/python.scm > +++ b/gnu/packages/python.scm > @@ -190,6 +190,9 @@ > "--enable-unicode=ucs4" > (string-append "LDFLAGS=-Wl,-rpath=" > (assoc-ref %outputs "out") "/lib")) > + ;; With no -j argument tests use all available cpus, so provide one. > + #:make-flags > + (list (format #f "EXTRATESTOPTS=-j~d" (parallel-job-count))) > > #:modules ((ice-9 ftw) (ice-9 match) > (guix build utils) (guix build gnu-build-system)) Hi Eric, I'm having trouble building the python2 package on core-updates (which was renamed from core-updates-next), and I think it relates to this change. This is roughly the issue I'm seeing: LD_LIBRARY_PATH=/tmp/guix-build-python2-2.7.15.drv-0/Python-2.7.15 ./python -Wd -3 -E -tt ./Lib/test/regrtest.py -l -j12 -l and -j don't go together! Since all the python packages look to inherit from python-2.7 that's being changed here, perhaps this worked for some of them (I know you mentioned python-minimal in one message), but not all of them, or at least python2? Thanks, Chris