justfile does not preserver the command exit code

i have the next just file, when I have an error in the dotnet build code, the build returns 1 exit code, yet just files does not return that code to use with GitHub actions in the CI/CD, how can I get the exit code from the dotnet build and use it in the action?

```
null:

clean:
abp clean && dotnet clean && dotnet nuget locals all --clear

build:
export $(grep -v '^#' .env | xargs) && dotnet build -nologo -verbosity:quiet -graph || exit $?
```