Installation failure on OSX due to UID clash

[thomas-mangin]

Platform

• Linux:
• macOS
• WSL

Additional information

The user ID 301 was already in use by a previously installed application.

❯ id 301                                                                                            
uid=301(SonosDMS) gid=301 groups=301,12(everyone),20(staff),61(localaccounts),701(com.apple.sharepoint.group.1),703(com.apple.sharepoint.group.3),702(com.apple.sharepoint.group.2),100(_lpoperator)

Output

Output

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

    $ sudo /usr/bin/dscl . create /Users/_nixbld1 UniqueID 301

Creating the Nix build user (#1), _nixbld1

<main> attribute status: eDSRecordAlreadyExists
<dscl_cmd> DS Error: -14135 (eDSRecordAlreadyExists)

---- oh no! --------------------------------------------------------------------

[abathur]

Same issue as #6153.

You'll have to follow the uninstall instructions to clean up first: https://nixos.org/manual/nix/stable/installation/installing-binary.html#macos

There's more context in the linked issue, but you'll either need to clear out whatever is holding the uid, or modify the installer to use a new one. The bit you'd need to change is at

nix/scripts/install-darwin-multi-user.sh

Line 9 in 946fd29

NIX_FIRST_BUILD_UID="301"

[thomas-mangin]

Sorry, I did not provide much information as I had already resolved the issue.

But thank you for still providing me help.

I was reporting the problem as I would have expected the installer to dynamically pick the UID in case of conflict and I assumed the UID conflict must not be that frequent.