Nix programs on path but not found

Nix programs on path but not found

[Stefan Baums]

Dear all,

I am running Guix with EXWM. Prior to Guix, in Ubuntu, I used
~/.xinitrc to set some environment variables and run some startup
programs. Since this is apparently not read in Guix+EXWM, I put
the following at the top of my ~/.exwm instead:

   (setenv "PATH" (concat (getenv "PATH") ":/home/user/.nix-profile/bin"))
   (setq exec-path (append exec-path '("/home/user/.nix-profile/bin")))

followed by:

   (start-process "xinit" "xinit" "bash" "/home/user/.xinitrc")

After startup, in eshell I then get:

   ~ $ echo $PATH
   /run/setuid-programs:/home/user/.config/guix/current/bin:/home/user/.guix-profile/bin:/home/user/.guix-profile/sbin:/run/current-system/profile/bin:/run/current-system/profile/sbin:/gnu/store/0c1yfbxyv877mlgychfgvmk5ha2jqh52-gzip-1.10/bin:/gnu/store/8fpk2cja3f07xls48jfnpgrzrljpqivr-coreutils-8.32/bin:/home/user/.nix-profile/bin

and when I check the value of exec-path, it is:

   ("/run/setuid-programs" "/home/user/.config/guix/current/bin" "/home/user/.guix-profile/bin" "/home/user/.guix-profile/sbin" "/run/current-system/profile/bin" "/run/current-system/profile/sbin" "/gnu/store/0c1yfbxyv877mlgychfgvmk5ha2jqh52-gzip-1.10/bin" "/gnu/store/8fpk2cja3f07xls48jfnpgrzrljpqivr-coreutils-8.32/bin" "/gnu/store/955rbw95zj8g2a3ail5zf9ml7jzi4zr0-emacs-27.2/libexec/emacs/27.2/x86_64-pc-linux-gnu" "/home/user/.nix-profile/bin")

(both as expected).

From ansi-term and from async-shell-command, I am now also able to
run programs installed in my Nix profile (e.g., onboard), but NOT
from eshell (even though PATH is there shown as above), and NOT
from the .xinitrc invoked from my .exwm startup script.

Does anybody what is going on here, and how to fix it?

All best,
Stefan

Re: Nix programs on path but not found

[Gary Johnson]

Stefan Baums <baums@stefanbaums.com> writes:

> I am running Guix with EXWM. Prior to Guix, in Ubuntu, I used
> ~/.xinitrc to set some environment variables and run some startup
> programs. Since this is apparently not read in Guix+EXWM, I put
> the following at the top of my ~/.exwm instead:
>
> ...snip...
>
> From ansi-term and from async-shell-command, I am now also able to
> run programs installed in my Nix profile (e.g., onboard), but NOT
> from eshell (even though PATH is there shown as above), and NOT
> from the .xinitrc invoked from my .exwm startup script.
>
> Does anybody what is going on here, and how to fix it?

I'm not sure what is happening in your particular case, but I am also
using Guix with EXWM (and have been doing so for several years now).

What I do for setting up my environment is this:

1. Declare environment variables in ~/.bash_profile (source ~/.bashrc
   from here as well).

2. Declare aliases in ~/.bashrc.

3. Set up my X environment (with xsetroot, xset, setxkbmap, xrdb, etc.)
   in ~/.xsession. End the ~/.xsession file with "exwm" on the final
   line.

4. Put my Emacs configuration in ~/.emacs.d/init.el.

5. Put my EXWM configuration in ~/.exwm.

6. Put my eshell aliases in ~/.emacs.d/eshell/alias.

When I log in via Guix's graphical login prompt, each of the files I
listed above are executed in the order that I named them. All
environment variable settings from my ~/.bash_profile are inherited by
all shells (including eshell) in Emacs.

Have fun and happy hacking!
  Gary

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