Update release notes

Author: cole-h

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

@@ -211,16 +211,10 @@ This section lists the differences between upstream Nix 2.33 and Determinate Nix
 
 <!-- Determinate Nix version 3.18.0 -->
 
-* CI: Do the static build in a separate job by @edolstra in [DeterminateSystems/nix-src#419](https://github.com/DeterminateSystems/nix-src/pull/419)
+* LocalStore::addToStore(): Show hash mismatches in SRI format [DeterminateSystems/nix-src#423](https://github.com/DeterminateSystems/nix-src/pull/423)
 
-* Backward compatibility hack for getFlake applied to unsafeDiscardStringContext by @edolstra in [DeterminateSystems/nix-src#422](https://github.com/DeterminateSystems/nix-src/pull/422)
+* Upload crash info to Sentry [DeterminateSystems/nix-src#418](https://github.com/DeterminateSystems/nix-src/pull/418)
 
-* LocalStore::addToStore(): Show hash mismatches in SRI format by @edolstra in [DeterminateSystems/nix-src#423](https://github.com/DeterminateSystems/nix-src/pull/423)
+* Fix empty Git exports when using legacy Git compatibility [DeterminateSystems/nix-src#425](https://github.com/DeterminateSystems/nix-src/pull/425)
 
-* Upload crash info to Sentry by @edolstra in [DeterminateSystems/nix-src#418](https://github.com/DeterminateSystems/nix-src/pull/418)
-
-* boost::thread_resource_error improvements by @edolstra in [DeterminateSystems/nix-src#427](https://github.com/DeterminateSystems/nix-src/pull/427)
-
-* getLegacyGitAccessor(): Don't ignore errors by @edolstra in [DeterminateSystems/nix-src#425](https://github.com/DeterminateSystems/nix-src/pull/425)
-
-* Provide the pre-build hook with a JSON serialization of the derivation by @edolstra in [DeterminateSystems/nix-src#424](https://github.com/DeterminateSystems/nix-src/pull/424)
+* Provide 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

@@ -3,13 +3,40 @@
 * Based on [upstream Nix 2.33.3](../release-notes/rl-2.33.md).
 
 ## What's Changed
-* CI: Do the static build in a separate job by @edolstra in [DeterminateSystems/nix-src#419](https://github.com/DeterminateSystems/nix-src/pull/419)
-* Backward compatibility hack for getFlake applied to unsafeDiscardStringContext by @edolstra in [DeterminateSystems/nix-src#422](https://github.com/DeterminateSystems/nix-src/pull/422)
-* LocalStore::addToStore(): Show hash mismatches in SRI format by @edolstra in [DeterminateSystems/nix-src#423](https://github.com/DeterminateSystems/nix-src/pull/423)
-* Upload crash info to Sentry by @edolstra in [DeterminateSystems/nix-src#418](https://github.com/DeterminateSystems/nix-src/pull/418)
-* boost::thread_resource_error improvements by @edolstra in [DeterminateSystems/nix-src#427](https://github.com/DeterminateSystems/nix-src/pull/427)
-* getLegacyGitAccessor(): Don't ignore errors by @edolstra in [DeterminateSystems/nix-src#425](https://github.com/DeterminateSystems/nix-src/pull/425)
-* Provide the pre-build hook with a JSON serialization of the derivation by @edolstra in [DeterminateSystems/nix-src#424](https://github.com/DeterminateSystems/nix-src/pull/424)
+
+### 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)