# Support for non-POSIX shells
**URL:** https://discourse.julialang.org/t/support-for-non-posix-shells/72236
**Category:** Internals & Design
**Tags:** shell
**Created:** [November 29, 2021, 2:42pm UTC](https://discourse.julialang.org/t/support-for-non-posix-shells/72236 "2021-11-29T14:42:41Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@kubouch](https://discourse.julialang.org/u/kubouch)
#### Post date: [November 29, 2021, 2:42pm UTC](https://discourse.julialang.org/t/support-for-non-posix-shells/72236/1 "2021-11-29T14:42:42Z")
The Julia’s shell mode does not seem to work properly when a non-POSIX shell is set as the default system shell. I’m using [Nushell](https://github.com/nushell/nushell), however, I imagine a similar issue is also present with other popular non-POSIX shells, such as fish, ion or elvish.
(I’m asking with a Linux environment in mind. I haven’t tried the Windows + PowerShell combo.)
Basically, the issue I have is that I cannot run common tasks in Julia’s shell since it apparently expects some degree of compliance with POSIX shells, such as Bash:
```julia
julia> ;
shell> ls
error: Coercion error
┌─ shell:1:1
│
1 │ (ls) && true
│ ^^^^ ---- string
│ │
│ table
```
The strange-looking error comes from Nushell: The `&&` is a boolean operator and the error tells you that you cannot perform boolean “AND” on a table (output of `ls`) and a string.
My questions are:
1. How is the shell handled in Julia?
2. Is is possible to add support for non-POSIX shells to Julia?
3. How hard would it be?
I am very new to Julia, but I am likely going to use it a lot in the near future and I would be willing to contribute in this area, if it is within some reasonable complexity.
To me, it seems like removing the `()` and `&&` wrapping should solve the issue. This could be configurable so that POSIX users will still have the same experience.
A temporary workaround is to set the [JULIA\_SHELL](https://docs.julialang.org/en/v1/manual/environment-variables/#JULIA_SHELL) to, e.g., Bash before running julia, but of course, ideally, you want to use your favourite shell.
---
### Author:  [@MarcMush](https://discourse.julialang.org/u/MarcMush)
#### Post date: [November 29, 2021, 2:55pm UTC](https://discourse.julialang.org/t/support-for-non-posix-shells/72236/2 "2021-11-29T14:55:21Z")
The shell mode in windows+powershell also has problems
[https://github.com/JuliaLang/julia/issues/23597](https://github.com/JuliaLang/julia/issues/23597)