fix: Bump fable to version used in Poseidon

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.envrc

@@ -0,0 +1,2 @@
+# shellcheck shell=bash
+use nix

README.md

@@ -1,2 +1,98 @@
-# obx-pkgs
+# Oceanbox Nixpkgs
 
+`obx-pkgs` is the shared Oceanbox Nix overlay. It collects packages that we use
+across projects but that are either not in nixpkgs, are stuck on an outdated
+version, or need internal patches. Each project that consumes the overlay gets
+the same versions, the same fixes, and a single place to update them.
+
+## Usage
+
+### As an overlay on nixpkgs (recommended)
+
+With `npins`:
+
+```nix
+{
+  sources ? import ./npins,
+  pkgs ? import sources.nixpkgs {
+    overlays = [ (import "${sources.obx-pkgs}/overlay.nix") ];
+  },
+}:
+# pkgs.arcosparse, pkgs.openzl, pkgs.sphinx-shibuya-theme, ... are now available
+```
+
+With `flakes`:
+
+```nix
+{
+  inputs.obx-pkgs.url = "git+https://git.oceanbox.io/oceanbox/obx-pkgs";
+
+  outputs = { nixpkgs, obx-pkgs, ... }: {
+    legacyPackages.x86_64-linux = import nixpkgs {
+      system = "x86_64-linux";
+      overlays = [ obx-pkgs.overlays.default ];
+    };
+  };
+}
+```
+
+### As a standalone package set
+
+```nix
+let
+  obx = import sources.obx-pkgs { };
+in
+  [ obx.copernicusmarine obx.sz3 ]
+```
+
+Useful when you want one of our packages without modifying the rest
+of nixpkgs.
+
+## Adding a package
+
+```text
+by-name/
+  <package-name>/
+    default.nix
+```
+
+`default.nix` is a regular `callPackage` function, the same shape you would
+write for nixpkgs:
+
+```nix
+{ stdenv, fetchFromGitHub, ... }:
+stdenv.mkDerivation { ... }
+```
+
+Cross-references between our own packages work via the standard argument syntax
+name the dependency in the argument list (e.g. `arcosparse`) and the overlay's
+`self.callPackage` injects it.
+
+Once the directory exists it is picked up automatically
+
+## Development
+
+```text
+nix-shell
+```
+
+drops you into a shell with `npins`, `nix-init`, `nix-update`, and a
+pre-configured `treefmt`.
+
+Format the tree:
+
+```text
+treefmt
+```
+
+Update a pin:
+
+```text
+npins update nixpkgs
+```
+
+Bump a package version:
+
+```text
+nix-update -f . <package-name>
+```

by-name/fable_4_24/default.nix

@@ -0,0 +1,7 @@
+{ buildDotnetGlobalTool }:
+buildDotnetGlobalTool {
+  pname = "fable";
+  version = "4.24.0";
+  nugetHash = "sha256-ERewWqfEyyZKpHFFALpMGJT0fDWywBYY5buU/wTZZTg=";
+  meta.mainProgram = "fable";
+}

by-name/fable_4_29/default.nix

@@ -0,0 +1,7 @@
+{ buildDotnetGlobalTool }:
+buildDotnetGlobalTool {
+  pname = "fable";
+  version = "4.29.0";
+  nugetHash = "sha256-Eed1bb9heteWOWmv6NnXPzXbf3t218K/eHufwgtRuzI=";
+  meta.mainProgram = "fable";
+}

by-name/fsharp-analyzers_0_35/default.nix

@@ -0,0 +1,7 @@
+{ buildDotnetGlobalTool }:
+buildDotnetGlobalTool {
+  pname = "fsharp-analyzers";
+  version = "0.35.0";
+  nugetHash = "sha256-GxQR3Fq28cb+akNbzRTav9nhMtayN/0g2d1G6Ml+ck4=";
+  meta.mainProgram = "fsharp-analyzers";
+}

by-name/sz3/default.nix

@@ -24,14 +24,13 @@ stdenv.mkDerivation {
     pkg-config
   ];
 
-  buildInputs =
-    [
-      zstd
-      gsl
-    ]
-    ++ lib.optionals stdenv.cc.isClang [
-      llvmPackages.openmp
-    ];
+  buildInputs = [
+    zstd
+    gsl
+  ]
+  ++ lib.optionals stdenv.cc.isClang [
+    llvmPackages.openmp
+  ];
 
   cmakeFlags = [
     "-DBUILD_SHARED_LIBS=ON"

npins/sources.json

@@ -5,6 +5,19 @@
       "name": "nixos-unstable",
       "url": "https://releases.nixos.org/nixos/unstable/nixos-26.05pre1004030.64c08a7ca051/nixexprs.tar.xz",
       "hash": "sha256-NpH8iEQ5JHv/BtUuzTEXUMDxPLetCDzIv4OxL8H7Kps="
+    },
+    "treefmt-nix": {
+      "type": "Git",
+      "repository": {
+        "type": "GitHub",
+        "owner": "numtide",
+        "repo": "treefmt-nix"
+      },
+      "branch": "main",
+      "submodules": false,
+      "revision": "db947814a175b7ca6ded66e21383d938df01c227",
+      "url": "https://github.com/numtide/treefmt-nix/archive/db947814a175b7ca6ded66e21383d938df01c227.tar.gz",
+      "hash": "sha256-eynAfOmbmxJnkp7YewvCEbShNnnYJ9gLLqkzsYtBPeM="
     }
   },
   "version": 7

shell.nix

@@ -2,12 +2,14 @@
   sources ? import ./npins,
   pkgs ? import sources.nixpkgs { },
 }:
-
+let
+  treefmt = pkgs.callPackage ./tools/treefmt.nix { inherit sources; };
+in
 pkgs.mkShellNoCC {
   packages = [
     pkgs.npins
     pkgs.nix-init
-    pkgs.nixfmt-rfc-style
     pkgs.nix-update
+    treefmt
   ];
 }

tools/treefmt.nix

@@ -0,0 +1,22 @@
+{ pkgs, sources, ... }:
+let
+  treefmt-nix = import sources.treefmt-nix;
+in
+treefmt-nix.mkWrapper pkgs {
+  projectRootFile = ".git/config";
+  programs = {
+    nixfmt.enable = true;
+    deadnix.enable = true;
+    statix = {
+      enable = true;
+      disabled-lints = [
+        "manual_inherit_from"
+        "repeated_keys"
+      ];
+    };
+    shellcheck.enable = true;
+  };
+  settings.global.excludes = [
+    "npins/default.nix"
+  ];
+}