After performing a git commit tag update on plutus-apps, I restarted my computer, and ran nix doctor --verbose and got the following FAIL

  [FAIL] Multiple versions of nix found in PATH:

How do I correct this?

  • Updates on troubleshooting: 1. performed nix install sh <(curl -L https://nixos.org/nix/install) --daemon 2. read up on nix-store documentation 3. performed nix-store --delete /nix/store/j6fqvmsfhl4frzqn2f3bzhn8hr16j5q5-nix-2.5.1/bin to delete both instances, got "error: Cannot delete path /nix/store/... since it is still alive. To find out why, use: nix-store --query --roots.
    – TheStophe
    Commented Jan 20, 2022 at 2:03
  • I may have created two profiles in /nix/var/nix/profiles/per-user/<username> as profile-link-1 and profile-link-2, potentially two different user environments. I may have done something twice and nix made two different user env rather than overrride. See nixos.org/manual/nix/stable/…
    – TheStophe
    Commented Jan 20, 2022 at 2:31

1 Answer 1


I had success with just fully uninstalling nix.

However, uninstalling nix wasn't straight forward either (surprise!). From my research, here are options that worked.

How to uninstall nix:

  1. Script Github kintsugi/uninstall-nix-osx.sh


  1. Manually follow Github Issue, How to remove nix #1402

    • I did this just as backup, #1 already worked, although there were some caution statements.

  3. In new tab, in ~/plutus-apps directory

    • nix doctor --verbose now all passes!

So far, the nix-build, nix-shell have worked too...

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    Commented Jan 22, 2022 at 10:38

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