petsc4py 3.7.0-2 is marked for autoremoval from testing on 2017-02-01 It (build-)depends on packages with these RC bugs: 848784: petsc: FTBFS: make[2]: *** No rule to make target '/<<BUILDDIR>>/petsc-3.7.4+dfsg1/x86_64-linux-gnu-real-debug/lib/petsc/conf/petscrules'. Stop.