emacs 30 ssh: couldn't find a proper `ls' command

Hi, I've recently started using emacs 30 which I compile from source. Something that broke in the switch from emacs 29->30 is I am not able to use tramp to ssh into any of my guix servers. I get this error

```

Debugger entered--Lisp error: (file-error "Couldn't find a proper `ls' command")

```

I reported this as an Emacs bug - 72861 - and based on the data I provided -- full backtrace, etc. -- they indicated it was a guix bug. They pointed me to guix bug 64534.

However, I tried adding the appropriate directory to tramp-remote-path (/run/current-system/profile/bin) and that did not work.

If I switch back to 29.4 then I can access my servers again normally through tramp.

Here is my system information:

```

christopher@theoden

-------------------

OS: Guix System x86_64

Host: OptiPlex 9020 00

Kernel: 5.15.161-gnu

Uptime: 63 days, 19 hours, 14 mins

Packages: 167 (guix-system), 251 (guix-user)

Shell: bash 5.1.16

Resolution: 1920x1080

DE: GNOME

Theme: Adwaita [GTK2/3]

Icons: Adwaita [GTK2/3]

Terminal: guix

CPU: Intel i5-4570 (4) @ 3.600GHz

GPU: AMD ATI Radeon HD 8490 / R5 235X OEM

GPU: Intel HD Graphics

Memory: 5038MiB / 15914MiB

```

``` guix describe

Generation 143 Sep 03 2024 10:14:51 (current)

guix 82174b2

repository URL: https://git.savannah.gnu.org/git/guix.git

branch: master

commit: 82174b2742c2a59fd7959ba9acc80edd6f93d9f7

```

The emacs version I am testing is:

GNU Emacs 30.0.90 (build 5, x86_64-pc-linux-gnu, GTK+ Version 3.24.41, cairo version 1.18.0) of 2024-09-03

--

? Christopher Howard

? gemini://gem.librehacker.com

? http://gem.librehacker.com

?????? ??? ????? ?? ????? ??? ????

I haven't been struggling with this issue for some months now. I can't remember exactly what I did, but I think the key was this tramp-own-remote-path option:

```

'(tramp-remote-path

'(tramp-own-remote-path tramp-default-remote-path "/bin" "/usr/bin"

"/sbin" "/usr/sbin" "/usr/local/bin"

"/usr/local/sbin" "/local/bin"

"/local/freeware/bin" "/local/gnu/bin"

"/usr/freeware/bin" "/usr/pkg/bin"

"/usr/contrib/bin" "/opt/bin" "/opt/sbin"

"/opt/local/bin" "/opt/homebrew/bin"

"/opt/homebrew/sbin"

"/run/current-system/profile/bin"))

```

--

Christopher Howard

I'm having this problem as well but with emacs 29 on a foreign distro

trying to tramp ssh connect to a GuixSD system. I have added the same

paths to the "tramp-remote-path" but I get the same issue. I did notice

that the docs for the "tramp-remote-path" mentions that it needs

"getconf" first, otherwise it just uses /bin:/usr/bin :

Default Directories represent the list of directories given by

the command "getconf PATH".  It is recommended to use this

entry on head of this list, because these are the default

directories for POSIX compatible commands.  On remote hosts which

do not offer the getconf command, the value "/bin:/usr/bin" is

used instead.  This entry is represented in the list by the

special value tramp-default-remote-path.

The getconf utility doesn't seem to be available in Guix though.

Jesse