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Sender	Message	Time
1 Oct 2021
edrex	* what's the deal with the "packages .. have the same priority" messages when trying to `nix profile install nixpkgs#nixUnstable` or `bashInteractive`?	17:57:15
Las	edrex: You're trying to install packages that provide the same binaries.	18:03:06
Las	You likely already have a package with the binary in your profile.	18:03:18
edrex	you're right, i had regular bash. i'm unclear how to replace my nix package atomically ( need latest nixpkgs-unstable)	18:05:16
edrex	i should be using a flake.nix with home-manager etc, just trying to get something done real quick interactively.	18:06:10
Jez (he/him) 🌦️	`nix shell` might be a better option for that?	18:12:43
edrex	I should ask, "how can I update the system `nix` to a different branch of nixpkgs"?	18:15:31
edrex	any other package, i would `nix profile remove N` and reinstall	18:15:51
edrex	(this is single user mode	18:16:15
Roos	In reply to @edrex:matrix.org I should ask, "how can I update the system `nix` to a different branch of nixpkgs"? If using flakes, you can add `--override-input nixpkgs github:NixOS/nixpkgs/foo`, where foo is the target branch (or commit). If not using flakes, you can probably just `export NIX_PATH="nixpkgs=/nix/var/nix/profiles/per-user/myuser/channels/mychannel:$NIX_PATH"` before running your nix command.	18:21:16
edrex	In reply to @jez:petrichor.me `nix shell` might be a better option for that? `nix shell nixpkgs/nixpkgs-unstable#nixUnstable` gives `which nix` => /home/eric/.nix-profile/bin/nix, which isn't what I expect (the version in my profile isn't from `nixpkgs-unstable`)	18:27:36
edrex	In reply to @roosemberth:orbstheorem.ch If using flakes, you can add `--override-input nixpkgs github:NixOS/nixpkgs/foo`, where foo is the target branch (or commit). If not using flakes, you can probably just `export NIX_PATH="nixpkgs=/nix/var/nix/profiles/per-user/myuser/channels/mychannel:$NIX_PATH"` before running your nix command. Roos: i'm not using a flake for this rn. i have home-manager set up with my nixos hosts but not on laptop yet. To override `NIX_PATH` in that way, i guess I would have to create another channel with the branch set to `nixpkgs-unstable`?	18:31:49
Roos	Yes.	18:32:07
Roos	In reply to @edrex:matrix.org `nix shell nixpkgs/nixpkgs-unstable#nixUnstable` gives `which nix` => /home/eric/.nix-profile/bin/nix, which isn't what I expect (the version in my profile isn't from `nixpkgs-unstable`) Where is the `nixpkgs/nixpkgs-unstable` flake coming from? (You can use `nix registry list` to list the ones nix can see)	18:33:01
Roos	Unless `nixpkgs/foo` is some syntax I do not know.	18:33:11
edrex	for context, I'm trying to install a nix with the workaround for https://github.com/nix-community/nix-direnv/issues/113 so I can do something other than mess around with nix :D	18:33:16
edrex	In reply to @roosemberth:orbstheorem.ch Unless `nixpkgs/foo` is some syntax I do not know. i mean, the flake output specifier can have the form `nixpkgs/release-20.09#hello`	18:36:35
Roos	TIL :D	18:37:44
edrex	In reply to @roosemberth:orbstheorem.ch If using flakes, you can add `--override-input nixpkgs github:NixOS/nixpkgs/foo`, where foo is the target branch (or commit). If not using flakes, you can probably just `export NIX_PATH="nixpkgs=/nix/var/nix/profiles/per-user/myuser/channels/mychannel:$NIX_PATH"` before running your nix command. * Roos: i'm not using a flake for this rn. i have home-manager set up with my nixos hosts but not on laptop yet. To override `NIX_PATH` in that way, i guess I would have to create another channel with the branch set to `nixpkgs-unstable`? note: first sent a few minutes ago, matrix troubles	18:44:44
bew	In reply to @edrex:matrix.org `nix shell nixpkgs/nixpkgs-unstable#nixUnstable` gives `which nix` => /home/eric/.nix-profile/bin/nix, which isn't what I expect (the version in my profile isn't from `nixpkgs-unstable`) I use realpath `which nix` to get the full path to the current nix, then remove its package and use the fullpath to the previous nix to install new nix version	19:54:16
2 Oct 2021
	nf changed their profile picture.	00:16:52
Las	The issue with that is that GC might remove the Nix in that small available timeframe.	10:14:17
Las	* The issue with that is that GC might remove the Nix in that small timeframe.	10:14:24
Las	The best solution is likely installing the new Nix with a higher priority, then uninstalling the old one.	10:15:04
bew	In reply to @Las:matrix.org The issue with that is that GC might remove the Nix in that small timeframe. You have automatic gc running? You could always open a nix shell with a nix version, this way you always have one (which cannot be gc'ed)	12:06:29
Las	That is another solution. Lots of people have automatic GC running.	12:07:06
balsoft	I've found a weird issue with Nix not adding a flake source as a runtime dependency. In particular: `environment.etc."nixpkgs".source = pkgs.path;` When `pkgs` comes from a nixpkgs flake produces a "broken" `etc`: it has `nixpkgs` symlink pointing to `-source` nix store path containing the nixpkgs flake, but this path is not a runtime dependency of `etc` derivation, e.g. doesn't show up `nix-store -qR` or `nix why-depends`. `toString`-ing the `pkgs.path` beforehand doesn't fix the issue (as expected, since it gets toString-ed down the line anyways). Doing `environment.etc."nixpkgs".source = pkgs.copyPathToStore pkgs.path;` Fixes the problem, but it's just weird.	15:04:25
tomberek	Does it help to do string interpolation with pkgs.path as you use it? “${pkgs.path}” ?	17:11:25
balsoft	In reply to @tomberek:matrix.org Does it help to do string interpolation with pkgs.path as you use it? “${pkgs.path}” ? Isn't `"${pkgs.path}"` exactly the same as `toString pkgs.path` ?	17:11:47
balsoft	I can try it I guess...	17:11:53

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