Graham Bennett 82ddb13098 Unlock output paths when a derivation is already built
Without this change, nix build processes will not drop the locks for derivation goals
which have already been built by another process when the current process gets
round to building them. This means the locks are held until the process
terminates.

If there are other nix build processes in a similar state, they will also try to
acquire the same locks when they try to build the same derivation, and so will
wait until the lock holder terminates (which might be a very long time if it has
a lot to build). In some pathological cases, those processes might be holding
their own locks on other derivations due to the same issue, and this can lead to
deadlock.

Resolves #6468
2023-09-09 10:11:11 +01:00
2021-06-01 11:42:38 +02:00
2017-06-05 22:57:28 +01:00
2023-07-24 21:30:33 +02:00
2023-08-23 19:28:24 +01:00
2023-04-03 18:45:20 +02:00
2023-02-13 12:00:00 +04:00
2022-01-24 13:28:21 +01:00

Nix

Open Collective supporters Test

Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. Please refer to the Nix manual for more details.

Installation

On Linux and macOS the easiest way to install Nix is to run the following shell command (as a user other than root):

$ curl -L https://nixos.org/nix/install | sh

Information on additional installation methods is available on the Nix download page.

Building And Developing

See our Hacking guide in our manual for instruction on how to to set up a development environment and build Nix from source.

Additional Resources

License

Nix is released under the LGPL v2.1.

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