MacOS catalina failing initial installation of Nix script

[wesbragagt]

Platform

• Linux:
• macOS
• WSL

Additional information

I executed

1. sh <(curl -L https://nixos.org/nix/install)
2. Confirmed Y for all the prompts

Output

---- sudo execution ------------------------------------------------------------
I am executing:

    $ sudo /usr/bin/ex -u NONE -n /etc/synthetic.conf

to add Nix to /etc/synthetic.conf


---- oh no! --------------------------------------------------------------------
error: failed to configure synthetic.conf

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[abathur]

I don't think we've had a report like this in a while, but this sounds a bit like an issue that can pop up if something in your vimrc/plugins causes vim to exit with an error.

Can you try running:

/usr/bin/ex -u NONE -n boofar <<EOF
:a
nix
.
:x
EOF
echo $?
/bin/rm boofar

(This will just try to create a file like the installer does, check the status, and then remove the file.)