improve model debugging workflow - #611

these 5 derivations will be built:
  /nix/store/909g1llay3fh7ki995xsy12vhcs2bcb7-install-agenix-shell.drv
  /nix/store/c44cihhhhnr4fh2f341slvqcr6j2yjg6-psyche-python-extension-0.2.0.drv
  /nix/store/ywacpwkbqrnjc23ysfbyjwsvaq8cy3yi-psyche.drv
  /nix/store/yiw1blskp0fh8jjnn308z3y75sjpq592-psyche-python-env.drv
  /nix/store/k6k4v8wa7jrn7gkkzmz0pjwvryi9i13w-nix-shell.drv
this path will be fetched (0.43 MiB download, 5.56 MiB unpacked):
  /nix/store/q7whraq6h87grwcbhmc0b1sr31qmylf4-cargo-all-features-1.12.0
nix-shell> source: sourcing removeStubsFromRunpathHook.bash (hostOffset=-1) (targetOffset=0)
nix-shell> source: added removeStubsFromRunpathHookRegistration to prePhases
nix-shell> Sourcing fix-elf-files.sh
nix-shell> Running phase: buildPhase