Unable to echo env variables in nushell

[wymli]

Describe the bug

I can't echo $SHELL in nushell, but I can see that it does exist in env.

How to reproduce

1. download the pre-built binary from github-release
2. add to $path
3. exec nu

Expected behavior

show $SHELL

Screenshots

Configuration

/home/liweiming〉version | transpose key value | to md --pretty 05/30/2022 07:26:06 PM| key | value |
| ------------------ | ----------------------------------------------- |
| version | 0.63.0 |
| branch | |
| commit_hash | 06cf3fa |
| build_os | linux-x86_64 |
| build_target | x86_64-unknown-linux-gnu |
| rust_version | rustc 1.61.0 (fe5b13d68 2022-05-18) |
| rust_channel | stable-x86_64-unknown-linux-gnu |
| cargo_version | cargo 1.61.0 (a028ae4 2022-04-29) |
| pkg_version | 0.63.0 |
| build_time | 2022-05-25 01:07:50 +00:00 |
| build_rust_channel | release |
| features | database, dataframe, default, trash, which, zip |
| installed_plugins | |

Additional context

No response

[sholderbach]

Environment variables are members of the record in the $env variable. So in this case echo $env.SHELL

[wymli]

Thanks