update nixpkgs, lix pins

the buildkite docs seem to be incomplete. `timed_out` is also a valid
failure state, but this isn't mentioned anywhere in the rest api docs

calculate-buildkite-steps.py

@@ -139,7 +139,7 @@ try:
             # failed (but not retried).
             #
             # This information is checked by querying the Buildkite REST API
-            # and counting all `failed` or `canceled` steps.
+            # and counting all non-`passed` steps.
             #
             # This step must be :ice_cream: (yes, really!) because the post-command
             # hook will inspect this name.
@@ -155,7 +155,7 @@ try:
                 readonly FAILED_JOBS=$(curl --silent \
                     -H "Authorization: Bearer $(buildkite-agent secret get build_status_token)" \
                     "https://api.buildkite.com/v2/organizations/$${BUILDKITE_ORGANIZATION_SLUG}/pipelines/$${BUILDKITE_PIPELINE_SLUG}/builds/$${BUILDKITE_BUILD_NUMBER}" \
-                    | jq '.jobs | map(select(.state == "failed" or .state == "canceled")) | length')
+                    | jq '.jobs | map(select(has("state") and .state != "passed" and .name != ":ice_cream:")) | length')
 
                 echo "$$FAILED_JOBS build jobs failed."
                 (( $$FAILED_JOBS == 0 ))

flake.lock

@@ -53,16 +53,17 @@
       "inputs": {
         "flake-compat": "flake-compat",
         "nix2container": "nix2container",
-        "nixpkgs": "nixpkgs",
+        "nix_2_18": "nix_2_18",
+        "nixpkgs": "nixpkgs_2",
         "nixpkgs-regression": "nixpkgs-regression",
         "pre-commit-hooks": "pre-commit-hooks"
       },
       "locked": {
-        "lastModified": 1739846668,
-        "narHash": "sha256-B0+90JxZ7m+NVTb82Y8/R5OvKJrJhFDO2LtIxM7JNfw=",
+        "lastModified": 1759921757,
+        "narHash": "sha256-Ehc6T61Ntmxq/o1+9J2WttwjAoA86KW3z0rhGTg6GYA=",
         "ref": "refs/heads/main",
-        "rev": "0069c59eda80e89ef4e42f7629cb15b051b6cadd",
-        "revCount": 17430,
+        "rev": "5e2412ea7e3a8725355a07bed1f3cccc5506edcf",
+        "revCount": 18412,
         "type": "git",
         "url": "https://git.lix.systems/lix-project/lix"
       },
@@ -83,11 +84,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1738176840,
-        "narHash": "sha256-NG3IRvRs3u3btVCN861FqHvgOwqcNT/Oy6PBG86F5/E=",
+        "lastModified": 1756511062,
+        "narHash": "sha256-IgD1JR7scSEwlK/YAbmrcTWpAYT30LPldCUHdzXkaMs=",
         "ref": "refs/heads/main",
-        "rev": "621aae0f3cceaffa6d73a4fb0f89c08d338d729e",
-        "revCount": 133,
+        "rev": "3f09a5eb772e02d98bb8878ab687d5b721f00d16",
+        "revCount": 162,
         "type": "git",
         "url": "https://git.lix.systems/lix-project/nixos-module"
       },
@@ -96,6 +97,22 @@
         "url": "https://git.lix.systems/lix-project/nixos-module"
       }
     },
+    "lowdown-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1633514407,
+        "narHash": "sha256-Dw32tiMjdK9t3ETl5fzGrutQTzh2rufgZV4A/BbxuD4=",
+        "owner": "kristapsdz",
+        "repo": "lowdown",
+        "rev": "d2c2b44ff6c27b936ec27358a2653caaef8f73b8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "kristapsdz",
+        "repo": "lowdown",
+        "type": "github"
+      }
+    },
     "nix2container": {
       "flake": false,
       "locked": {
@@ -112,18 +129,46 @@
         "type": "github"
       }
     },
-    "nixpkgs": {
+    "nix_2_18": {
+      "inputs": {
+        "flake-compat": [
+          "lix",
+          "flake-compat"
+        ],
+        "lowdown-src": "lowdown-src",
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-regression": [
+          "lix",
+          "nixpkgs-regression"
+        ]
+      },
       "locked": {
-        "lastModified": 1733348545,
-        "narHash": "sha256-b4JrUmqT0vFNx42aEN9LTWOHomkTKL/ayLopflVf81U=",
+        "lastModified": 1730375271,
+        "narHash": "sha256-RrOFlDGmRXcVRV2p2HqHGqvzGNyWoD0Dado/BNlJ1SI=",
         "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "9ecb50d2fae8680be74c08bb0a995c5383747f89",
+        "repo": "nix",
+        "rev": "0f665ff6779454f2117dcc32e44380cda7f45523",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-24.11-small",
+        "ref": "2.18.9",
+        "repo": "nix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1705033721,
+        "narHash": "sha256-K5eJHmL1/kev6WuqyqqbS1cdNnSidIZ3jeqJ7GbrYnQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "a1982c92d8980a0114372973cbdfe0a307f1bdea",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-23.05-small",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -146,16 +191,32 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1739758141,
-        "narHash": "sha256-uq6A2L7o1/tR6VfmYhZWoVAwb3gTy7j4Jx30MIrH0rE=",
+        "lastModified": 1758391731,
+        "narHash": "sha256-UuwQoPWv13DVKMveeev+F0OC/N95AOmAz6SzCuGhxjQ=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "c618e28f70257593de75a7044438efc1c1fc0791",
+        "rev": "3f00d36f15e16e0471d9ca1e8f88958941fa970a",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-24.11",
+        "ref": "nixos-25.05-small",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1759735786,
+        "narHash": "sha256-a0+h02lyP2KwSNrZz4wLJTu9ikujNsTWIC874Bv7IJ0=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "20c4598c84a671783f741e02bf05cbfaf4907cff",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-25.05",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -180,7 +241,7 @@
       "inputs": {
         "lix": "lix",
         "lix-module": "lix-module",
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": "nixpkgs_3"
       }
     },
     "systems": {

flake.nix

@@ -1,6 +1,6 @@
 {
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
     lix.url = "git+https://git.lix.systems/lix-project/lix";
     lix-module = {
       url = "git+https://git.lix.systems/lix-project/nixos-module";