this derivation will be built:
  /nix/store/b5jllhzs9asrd3y0k6ypi7sn7a23yrfz-nix-shell.drv
building '/nix/store/b5jllhzs9asrd3y0k6ypi7sn7a23yrfz-nix-shell.drv'
nix-shell> Sourcing python-remove-tests-dir-hook
nix-shell> Sourcing python-catch-conflicts-hook.sh
nix-shell> Sourcing python-remove-bin-bytecode-hook.sh
nix-shell> Sourcing pypa-build-hook
nix-shell> Sourcing python-runtime-deps-check-hook
nix-shell> Using pythonRuntimeDepsCheckHook
nix-shell> Sourcing pypa-install-hook
nix-shell> Using pypaInstallPhase
nix-shell> Sourcing python-imports-check-hook.sh
nix-shell> Using pythonImportsCheckPhase
nix-shell> Sourcing python-namespaces-hook
nix-shell> Sourcing python-catch-conflicts-hook.sh
nix-shell> Running phase: buildPhase

post-build step Upload coverage to codecov: ok
Skipping codecov: project=Mic92/nix-update attr=x86_64-linux.devShell-default