diff --git a/.cargo/config.toml b/.cargo/config.toml
index 085f3158..802a1c59 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,9 +1,16 @@
-# Windows has stack overflows when calling from Tauri, so we increase the default stack size used by the compiler
-[target.'cfg(windows)']
-rustflags = ["-C", "link-args=/STACK:16777220", "--cfg", "tokio_unstable"]
+# Enable Cranelift for debug builds, improving iterative compile times
+[unstable]
+codegen-backend = true
 
-[target.x86_64-pc-windows-msvc]
-linker = "rust-lld"
+[profile.dev]
+codegen-backend = "cranelift"
 
 [build]
 rustflags = ["--cfg", "tokio_unstable"]
+
+# Windows has stack overflows when calling from Tauri, so we increase the default stack size used by the compiler
+[target.'cfg(windows)']
+rustflags = ["--cfg", "tokio_unstable", "-C", "link-args=/STACK:16777220"]
+
+[target.x86_64-pc-windows-msvc]
+linker = "rust-lld"
diff --git a/.github/workflows/turbo-ci.yml b/.github/workflows/turbo-ci.yml
index 0616743f..e5140c2f 100644
--- a/.github/workflows/turbo-ci.yml
+++ b/.github/workflows/turbo-ci.yml
@@ -18,6 +18,11 @@ jobs:
       FORCE_COLOR: 3
       # Make cargo nextest successfully ignore projects without tests
       NEXTEST_NO_TESTS: pass
+      # Fail on warnings in CI
+      # (but don't do this in the root `Cargo.toml`,
+      # since we don't want warnings to become errors
+      # while developing)
+      RUSTFLAGS: -Dwarnings
 
     steps:
       - name: 📥 Check out code
diff --git a/Cargo.toml b/Cargo.toml
index 5f0a461f..2c80cd5e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -218,10 +218,6 @@ todo = "warn"
 unnested_or_patterns = "warn"
 wildcard_dependencies = "warn"
 
-[workspace.lints.rust]
-# Turn warnings into errors by default
-warnings = "deny"
-
 [patch.crates-io]
 wry = { git = "https://github.com/modrinth/wry", rev = "f2ce0b0" }
 
diff --git a/apps/labrinth/src/database/models/version_item.rs b/apps/labrinth/src/database/models/version_item.rs
index 0aae95b2..c97a43e5 100644
--- a/apps/labrinth/src/database/models/version_item.rs
+++ b/apps/labrinth/src/database/models/version_item.rs
@@ -1010,7 +1010,7 @@ mod tests {
 
     #[test]
     fn test_version_sorting() {
-        let versions = vec![
+        let versions = [
             get_version(4, None, months_ago(6)),
             get_version(3, None, months_ago(7)),
             get_version(2, Some(1), months_ago(6)),
diff --git a/apps/labrinth/src/routes/v2/version_creation.rs b/apps/labrinth/src/routes/v2/version_creation.rs
index 9406ce55..0c27f200 100644
--- a/apps/labrinth/src/routes/v2/version_creation.rs
+++ b/apps/labrinth/src/routes/v2/version_creation.rs
@@ -73,12 +73,6 @@ pub struct InitialVersionData {
     pub ordering: Option<i32>,
 }
 
-#[derive(Serialize, Deserialize, Clone)]
-struct InitialFileData {
-    #[serde(default = "HashMap::new")]
-    pub file_types: HashMap<String, Option<FileType>>,
-}
-
 // under `/api/v1/version`
 #[post("version")]
 pub async fn version_create(
diff --git a/packages/app-lib/src/state/cache.rs b/packages/app-lib/src/state/cache.rs
index 98f1bb79..91fb6a41 100644
--- a/packages/app-lib/src/state/cache.rs
+++ b/packages/app-lib/src/state/cache.rs
@@ -519,11 +519,14 @@ impl CacheValue {
     }
 }
 
-#[derive(Deserialize, Serialize, PartialEq, Eq, Debug, Copy, Clone)]
+#[derive(
+    Deserialize, Serialize, PartialEq, Eq, Debug, Copy, Clone, Default,
+)]
 #[serde(rename_all = "snake_case")]
 pub enum CacheBehaviour {
     /// Serve expired data. If fetch fails / launcher is offline, errors are ignored
     /// and expired data is served
+    #[default]
     StaleWhileRevalidateSkipOffline,
     // Serve expired data, revalidate in background
     StaleWhileRevalidate,
@@ -533,12 +536,6 @@ pub enum CacheBehaviour {
     Bypass,
 }
 
-impl Default for CacheBehaviour {
-    fn default() -> Self {
-        Self::StaleWhileRevalidateSkipOffline
-    }
-}
-
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct CachedEntry {
     id: String,
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index b67e7d53..a6e94890 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,2 +1,9 @@
 [toolchain]
-channel = "1.89.0"
+channel = "nightly-2025-09-18"
+profile = "default"
+components = [
+	"rust-analyzer",
+	# use cranelift in debug builds to improve compile times
+	# also see `.cargo/config.toml`
+	"rustc-codegen-cranelift-preview"
+]