esptool's espefuse.py doesn't work

[wucke13]

Describe the bug

• Install esptool
• run espefuse.py

Traceback (most recent call last):
  File "/nix/store/d82aizmfkk3g2ymv5nyirsqvvf62w7lh-esptool-2.7/bin/.espefuse.py-wrapped", line 27, in <module>
    import esptool
  File "/nix/store/d82aizmfkk3g2ymv5nyirsqvvf62w7lh-esptool-2.7/bin/esptool.py", line 2
    export PATH='/nix/store/fara2bdicvvi0p8bmrgcz6s8d6yicijc-python3-3.7.6/bin:/nix/store/d82aizmfkk3g2ymv5nyirsqvvf62w7lh-esptool-2.7/bin:/nix/store/qkn0xsrkx4dwd98rbb1rgh1cp4jhfmwm-python3.7-pyserial-3.4/bin'${PATH:+':'}$PATH
              ^
SyntaxError: invalid syntax

Looks like espefuse.py tries to source the esptool.py wrapper script.

Expected behavior

The usage of the tool gets shown

Additional context
Looks like somebody did not the "all executables in /bin work" test

Metadata

• system: "x86_64-linux"
• host os: Linux 5.5.9, NixOS, 20.09pre216896.0729b8c55e0 (Nightingale)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.3.3
• channels(root): "nixos-20.03beta591.99a3d7a86fc"
• channels(wucke13): "nixos-unstable-20.09pre215947.82b54d49066"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute:
# a list of nixos modules affected by the problem
module:

[stale]

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[wucke13]

Still relevant!

> nix-shell -p esptool
these paths will be fetched (0.13 MiB download, 0.70 MiB unpacked):
  /nix/store/09z3hybpbsza7fs7ra4jd22wjynxy9zq-python3.8-pyaes-1.6.1
  /nix/store/yyb51l487y3rihg2dgzlzqa6m6nwxkyc-esptool-2.7
copying path '/nix/store/09z3hybpbsza7fs7ra4jd22wjynxy9zq-python3.8-pyaes-1.6.1' from 'https://cache.nixos.org'...
copying path '/nix/store/yyb51l487y3rihg2dgzlzqa6m6nwxkyc-esptool-2.7' from 'https://cache.nixos.org'...

[nix-shell:~]$ espefuse.py
Traceback (most recent call last):
  File "/nix/store/yyb51l487y3rihg2dgzlzqa6m6nwxkyc-esptool-2.7/bin/.espefuse.py-wrapped", line 27, in <module>
    import esptool
  File "/nix/store/yyb51l487y3rihg2dgzlzqa6m6nwxkyc-esptool-2.7/bin/esptool.py", line 2
    export PATH='/nix/store/bs03sg8b0gq2zr4v252hh9psp780qj5q-python3-3.8.5/bin:/nix/store/yyb51l487y3rihg2dgzlzqa6m6nwxkyc-esptool-2.7/bin:/nix/store/18xk8vr4zn8xvzv03bwylrqdjz8sqjwd-python3.8-pyserial-3.4/bin'${PATH:+':'}$PATH
           ^
SyntaxError: invalid syntax