Should I force all package derivation to flake way? y,.y "Too many open files"

PlumpMath · November 28, 2021, 9:53am

% nix
error: no subcommand specified
Try ‘nix --help’ for more information.

% nix search hello
error: experimental Nix feature ’ nix-command ’ is disabled; use '–extra-experimental-features nix-command ’ to override

% nix-env -i java-hello

installing ‘java-hello-1.0’
these 247 derivations will be built:
/nix/store/0076j8lvybr9qajc63mh9kxxpfzn77dz-maven-jar-plugin-2.4.jar.drv
/nix/store/008dfgyckv80i9a1sbh9m1fmmvkz119l-maven-compiler-plugin-3.1.jar.drv
/nix/store/02kz2vsm2zv99c3f959k05pr5qrgy2f0-backport-util-concurrent-3.1.pom.drv
/nix/store/04q9iq74km1dags22az7fmgpqn3h8js7-apache-4.pom.drv
/nix/store/09afxkn3jlhqx7wwlkbhknjr31f0h8yw-doxia-1.0-alpha-7.pom.drv
…
/nix/store/zqaxh7hrx7ncv99nhawwryqldvi6v7fs-maven-plugins-22.pom.drv
/nix/store/zwn8lxawxj74jcrf6i7hs9fl7a381j76-plexus-containers-1.5.5.pom.drv
/nix/store/q2h1qg6b0xx4ghvw4szxf9bg4y1qqvlx-mvn2nix-repository.drv
/nix/store/hb9sl8p5bpfx3lfwfbvy667m60zkzs6y-java-hello-1.0.drv
error: opening directory ‘/nix/store/4la0z6j0ks5hxpjqi1ngpdy29dmq8pbn-surefire-api-2.12.4.pom’: Too many open files

The last error occurs unconditionally when there is a lot of installation. Even if I set the macos max file configuration on the internet, it didn’t solve it, so I reinstalled nix, but the same.

PlumpMath · November 28, 2021, 10:57am

1,2 solution
https://nixos.wiki/wiki/Nix_command

edit /etc/nix/nix.conf
experimental-features = nix-command flakes

github.com/NixOS/nix

Improve flakes installables ergonomics, avoid nixpkgs# part?

opened 03:32PM - 08 Jan 21 UTC

closed 11:54AM - 11 Jan 21 UTC

dramforever

improvement

**Is your feature request related to a problem? Please describe.** It's kind …of annoying to keep typing `nixpkgs#` over and over in situations like: ```console $ nix shell nixpkgs#wireshark $ nix run nixpkgs#peek ``` Especially considering that `#` is kinda hard to type. **Describe the solution you'd like** I feel like this should just work: ```console $ nix shell wireshark $ nix run peek ``` To achieve this, I'm thinking about this scheme: - If an `INSTALLABLE` ~~does not contain either `:` or `#`~~ looks like an attribute name like `foo.bar.baz`, resolve it to some default flake, like either `flake:default#foo.bar.baz` or `flake:nixpkgs#foo.bar.baz` - Otherwise treat it as we do now I'm not sure if this is the intention, but I think I am going to use stuff under `nixpkgs#` far more than the various other flakes. When we do need other flakes, just put a `#` after the flake name, i.e. `foo#` still means `flake:foo`, and things like `github:owner/repo` still means that flake. **Describe alternatives you've considered** - Give `nixpkgs#` a shorter name: Still a bit hard to type, even if it's just `n#` **Additional context**

PlumpMath · November 28, 2021, 11:05am

PlumpMath · November 29, 2021, 6:50am

I split the package and processed it,
In my personal project like java-hello, the build fails. Use mvn2nix. Perhaps the mvn2nix developers or several other developers will have to look after them.