| 2 Oct 2021 |
 balsoft | Interesting | 17:13:16 |
| balsoft | Yeah it works fine with "${pkgs.path}" | 17:13:25 |
 tomberek | This comes up sometimes. Interpolation kicks in a “string with context” which gives the dependency tracking the info. | 17:13:32 |
| balsoft | Hm, I thought toString gave a string with context too... | 17:13:46 |
| balsoft | But yeah,
nix-repl> :t toString pkgs.path
a string
nix-repl> :t "${pkgs.path}"
a string with context
| 17:14:10 |
| balsoft | It makes a lot more sense now | 17:14:18 |
| balsoft | But I wonder why I never noticed this before flakes | 17:14:26 |
| tomberek | Well…. It’s a gotcha. And easy to mess up. Not sure what would help fix it in a user-friendly way. | 17:15:08 |
| balsoft | Oh, ok, even more interestingly .source = inputs.nixpkgs works fine (this is on my personal system) | 17:15:31 |
| balsoft | Aha, I think now I understand why it's not in runtime dependencies -- it's not in dependencies at all, so Nix doesn't even try scanning for its hash. | 17:16:43 |
| balsoft | In reply to @balsoft:balsoft.ru
Oh, ok, even more interestingly .source = inputs.nixpkgs works fine (this is on my personal system) That's because toString inputs.nixpkgs is a string with context | 17:18:27 |
| balsoft | In reply to @tomberek:matrix.org
Well…. It’s a gotcha. And easy to mess up. Not sure what would help fix it in a user-friendly way. What's the problem with making toString /some-path return a string with context? | 17:18:54 |
| balsoft | Oh, ok, that's probably because it would then break some stuff since you can't pass strings with contexts around as easily, e.g. as derivation names, correct? | 17:19:32 |
| tomberek | /some-path is not always in the store | 17:23:12 |
| balsoft | I guess I'm saying it should work the same as "${/some-path}" (which copies it to the store) | 17:24:06 |
| tomberek | This is from 2005: https://github.com/NixOS/nix/blob/master/src/libexpr/primops.cc#L3097-L3105 | 17:30:02 |
| balsoft | Aha, yes, I see why I'm wrong on that part | 17:30:39 |
| balsoft | It would break a lot of useful path operations... | 17:30:48 |
| balsoft | I remember now | 17:30:51 |
| balsoft | Thanks! | 17:31:03 |
| balsoft | (I am kind of ashamed right now because now I clearly remember fiddling with string interpolation vs. toString and figuring out the difference...) | 17:31:36 |
| tomberek | It does come up often. Especially with flakes for some reason (maybe just more people? or more interesting uses being experimented with?) | 17:31:53 |
| balsoft | Perhaps it should be documented more prominently? | 17:41:51 |
| 3 Oct 2021 |
|  cdepillabout joined the room. | 12:54:19 |
|  Charlie Hanley joined the room. | 14:55:04 |
|  andrew joined the room. | 19:59:40 |
| 4 Oct 2021 |
|  j-k set a profile picture. | 15:07:38 |
|  cafkafk joined the room. | 19:10:53 |
 edrex | i'm trying unsuccessfully to upgrade my nixUnstable to get the fix for https://github.com/nix-community/nix-direnv/issues/113
I installed it with nix-env.
❯ nix upgrade-nix => error: directory '/home/eric/.nix-profile/bin' does not appear to be part of a Nix profile
~ ❯ nix-env -iA nixpkgs.nixUnstable => error: profile '/nix/var/nix/profiles/per-user/eric/profile' is incompatible with 'nix-env'; please use 'nix profile' instead
| 21:34:01 |
| edrex | what should I be doing here? | 21:34:16 |
