EDIT: check out fix-python instead, make Python run "as usual" on NixOS!

• You are using NixOS
• You start working on a Python project
• You manage the dependencies in a classic Python virtual environment using pip or poetry

After watching Bryan Cantrill's presentation on [Running Aground: Debugging Docker in Production][aground] I got all excited (and strangely nostalgic) about the possibility of core-dumping server-side Python apps whenever they go awry. This would theoretically allow me to fully inspect the state of the program at the point it exploded, rather than relying solely on the information of a stack trace.

If you are getting this in gdb on macOS while trying to run a program:

Unable to find Mach task port for process-id 57573: (os/kern) failure (0x5).
 (please check gdb is codesigned - see taskgated(8))

1. Open Keychain Access
2. In menu, open Keychain Access > Certificate Assistant > Create a certificate
3. Give it a name (e.g. gdbc)

There's a couple of ways, one way is

• Get search results
  • Do SPC / and type in your search string
  • or SPC x S and search string - where x is your scope indicator (p for project, d for directory, etc..)
• Once you have the occurences you want, hit C-c C-e inside the helm buffer to put all your match occurences and puts them into a special buffer called the edit buffer or something like that
• in that buffer you can use any commands you'd normally use on a buffer
• the C-c C-c to commit your changes.

Emacs packages, features, files, layers, extensions, auto-loading, require, provide, use-package… All these terms getting you confused? Let’s clear up a few things.

Emacs files contains code that can be evaluated. When evaluated, the functions, macros and modes defined in that file become available to the current Emacs session. Henceforth, this will be termed as loading a file.

One major problem is to ensure that all the correct files are loaded, and in the