Merge pull request #430 from DeterminateSystems/release-v3.18.0/d972d0cb-97f7-4e73-a753-e07735d71935

Release v3.18.0

Author: detsys-spaghetti[bot]

.version-determinate

@@ -1 +1 @@
-3.17.3
+3.18.0

doc/manual/source/SUMMARY.md.in

@@ -146,6 +146,7 @@
   - [Contributing](development/contributing.md)
 - [Determinate Nix Release Notes](release-notes-determinate/index.md)
   - [Changes between Nix and Determinate Nix](release-notes-determinate/changes.md)<!-- next -->
+  - [Release 3.18.0 (2026-04-20)](release-notes-determinate/v3.18.0.md)
   - [Release 3.17.3 (2026-04-07)](release-notes-determinate/v3.17.3.md)
   - [Release 3.17.2 (2026-03-27)](release-notes-determinate/v3.17.2.md)
   - [Release 3.17.1 (2026-03-18)](release-notes-determinate/v3.17.1.md)

doc/manual/source/release-notes-determinate/changes.md

@@ -1,6 +1,6 @@
 # Changes between Nix and Determinate Nix
 
-This section lists the differences between upstream Nix 2.33 and Determinate Nix 3.17.3.<!-- differences -->
+This section lists the differences between upstream Nix 2.33 and Determinate Nix 3.18.0.<!-- differences -->
 
 * In Determinate Nix, flakes are stable. You no longer need to enable the `flakes` experimental feature.
 
@@ -153,43 +153,16 @@ This section lists the differences between upstream Nix 2.33 and Determinate Nix
 
 <!-- Determinate Nix version 3.15.2 -->
 
-* Path inputs are now lazy [DeterminateSystems/nix-src#312](https://github.com/DeterminateSystems/nix-src/pull/312)
-
-* Improved performance when fetching a lot of dependencies with curl [DeterminateSystems/nix-src#315](https://github.com/DeterminateSystems/nix-src/pull/315)
-
 <!-- Determinate Nix version 3.16.0 -->
 
-* Wasm support [DeterminateSystems/nix-src#309](https://github.com/DeterminateSystems/nix-src/pull/309)
-
-* Fix hung downloads when `http-connections = 0` [DeterminateSystems/nix-src#327](https://github.com/DeterminateSystems/nix-src/pull/327)
-
-* Support .gitattributes in subdirectories [DeterminateSystems/nix-src#335](https://github.com/DeterminateSystems/nix-src/pull/335)
-
-* builtins.getFlake fixes [DeterminateSystems/nix-src#337](https://github.com/DeterminateSystems/nix-src/pull/337)
+* Determinate Nix has an experimental builtin `builtins.wasm` that allows the Nix language to be extended using any language that compiles to Wasm. [DeterminateSystems/nix-src#309](https://github.com/DeterminateSystems/nix-src/pull/309)
 
-* builtins.getFlake: Support path values [DeterminateSystems/nix-src#338](https://github.com/DeterminateSystems/nix-src/pull/338)
+* `builtins.getFlake` supports path values. [DeterminateSystems/nix-src#338](https://github.com/DeterminateSystems/nix-src/pull/338)
 
-* Provenance [DeterminateSystems/nix-src#321](https://github.com/DeterminateSystems/nix-src/pull/321)
-
-* Add subcommand 'nix provenance show' [DeterminateSystems/nix-src#340](https://github.com/DeterminateSystems/nix-src/pull/340)
-
-* Increase the open file soft limit to the hard limit [DeterminateSystems/nix-src#347](https://github.com/DeterminateSystems/nix-src/pull/347)
+* Determinate Nix has support for keeping track of the provenance of store paths. [DeterminateSystems/nix-src#321](https://github.com/DeterminateSystems/nix-src/pull/321)
 
 <!-- Determinate Nix version 3.16.1 -->
 
-
-* Record provenance for unlocked inputs and impure evaluations in [DeterminateSystems/nix-src#354](https://github.com/DeterminateSystems/nix-src/pull/354)
-
-* Add setting narinfo-cache-meta-ttl in [DeterminateSystems/nix-src#355](https://github.com/DeterminateSystems/nix-src/pull/355)
-
-* Add derivationWithMeta builtin in [DeterminateSystems/nix-src#357](https://github.com/DeterminateSystems/nix-src/pull/357)
-
-* Add builtins.wasi in [DeterminateSystems/nix-src#359](https://github.com/DeterminateSystems/nix-src/pull/359)
-
-* Add `nix provenance verify` command in [DeterminateSystems/nix-src#356](https://github.com/DeterminateSystems/nix-src/pull/356)
-
-* builtins.hashString: Devirtualize lazy paths, and re-enable lazy trees tests in [DeterminateSystems/nix-src#360](https://github.com/DeterminateSystems/nix-src/pull/360)
-
 <!-- Determinate Nix version 3.16.2 -->
 
 
@@ -201,10 +174,12 @@ This section lists the differences between upstream Nix 2.33 and Determinate Nix
 
 <!-- Determinate Nix version 3.17.1 -->
 
-* Flake inputs are substituted if possible before fetching from the authoritative source, in [DeterminateSystems/nix-src#380](https://github.com/DeterminateSystems/nix-src/pull/380)
-
-* Provenance now supports additional nix.conf-defined tags, in [DeterminateSystems/nix-src#374](https://github.com/DeterminateSystems/nix-src/pull/374)
-
 <!-- Determinate Nix version 3.17.2 -->
 
 <!-- Determinate Nix version 3.17.3 -->
+
+<!-- Determinate Nix version 3.18.0 -->
+
+* Determinate Nix can upload crash info to Sentry. [DeterminateSystems/nix-src#418](https://github.com/DeterminateSystems/nix-src/pull/418)
+
+* Determinate Nix provides the pre-build hook with a JSON serialization of the derivation. [DeterminateSystems/nix-src#424](https://github.com/DeterminateSystems/nix-src/pull/424)

doc/manual/source/release-notes-determinate/v3.18.0.md

@@ -0,0 +1,42 @@
+# Release 3.18.0 (2026-04-20)
+
+* Based on [upstream Nix 2.33.3](../release-notes/rl-2.33.md).
+
+## What's Changed
+
+### Sentry integration
+
+In order to more proactively keep track of crashes, Sentry is now integrated into Determinate Nix.
+
+This allows us to more easily triage and remedy crashes that occur in the wild, without depending on manual use reports.
+
+It can be enabled by:
+
+* populating the file `/etc/nix/sentry-endpoint` with a Sentry DSN; or
+* setting the `NIX_SENTRY_ENDPOINT` environment variable to a Sentry DSN
+
+and can be disabled by:
+
+* setting the environment variable `DETSYS_IDS_TELEMETRY` to the value `disabled`; or
+* setting the environment variable `NIX_SENTRY_ENDPOINT` to an empty string
+
+PR: [DeterminateSystems/nix-src#418](https://github.com/DeterminateSystems/nix-src/pull/418)
+
+### Pre-build hook now receives the JSON serialization of the derivation
+
+The pre-build hook already received the path of the derivation as an argument, but that path doesn't typically exist when called as a remote build.
+
+Now, the pre-build hook is spawned with the environment variable `NIX_DERIVATION_V4` set to a file that contains the JSON representation of the derivation in v4 format, allowing instrospection of e.g. `requiredSystemFeatures` for scheduling decisions.
+
+PR: [DeterminateSystems/nix-src#424](https://github.com/DeterminateSystems/nix-src/pull/424)
+
+### Fix empty Git exports when using legacy Git compatibility
+
+A regression introduced in v3.16.0 made it possible for there to be empty Git exports in the Nix store when using legacy Git flakes (those depending on Nix 2.19 lockfile semantics).
+
+This is now fixed.
+
+PR: [DeterminateSystems/nix-src#425](https://github.com/DeterminateSystems/nix-src/pull/425)
+
+
+**Full Changelog**: [v3.17.3...v3.18.0](https://github.com/DeterminateSystems/nix-src/compare/v3.17.3...v3.18.0)