make: *** No rule to make target 'issue91.n.run', needed by 'all'.
make: *** No rule to make target 'issue91.a.run', needed by 'all'.
make: *** No rule to make target 'issue91.g.run', needed by 'all'.
make: *** No rule to make target 'issue91.gc.run', needed by 'all'.
make: *** No rule to make target 'issue91.ag.run', needed by 'all'.
make: *** No rule to make target 'issue91.agc.run', needed by 'all'.
make: *** No rule to make target 'issue95.n.run', needed by 'all'.
make: *** No rule to make target 'issue95.a.run', needed by 'all'.
make: *** No rule to make target 'issue95.g.run', needed by 'all'.
make: *** No rule to make target 'issue95.gc.run', needed by 'all'.
make: *** No rule to make target 'issue95.ag.run', needed by 'all'.
make: *** No rule to make target 'issue95.agc.run', needed by 'all'.
The update to
happy-1.19.6
in NixOS fails its test suite. I'm citing from https://hydra.nixos.org/build/60004784/nixlog/1: