diff --git a/crates/rust-analyzer/src/config.rs b/crates/rust-analyzer/src/config.rs
index 3314269ece..a8bf29ddf0 100644
--- a/crates/rust-analyzer/src/config.rs
+++ b/crates/rust-analyzer/src/config.rs
@@ -44,6 +44,9 @@ pub struct ServerConfig {
     /// Fine grained feature flags to disable specific features.
     pub feature_flags: FxHashMap<String, bool>,
 
+    /// Fine grained controls for additional `OUT_DIR` env variables
+    pub additional_out_dirs: FxHashMap<String, String>,
+
     pub rustfmt_args: Vec<String>,
 
     /// Cargo feature configurations.
@@ -64,6 +67,7 @@ impl Default for ServerConfig {
             cargo_watch_all_targets: true,
             with_sysroot: true,
             feature_flags: FxHashMap::default(),
+            additional_out_dirs: FxHashMap::default(),
             cargo_features: Default::default(),
             rustfmt_args: Vec::new(),
         }
diff --git a/crates/rust-analyzer/src/main_loop.rs b/crates/rust-analyzer/src/main_loop.rs
index 221f464b65..6d123f629b 100644
--- a/crates/rust-analyzer/src/main_loop.rs
+++ b/crates/rust-analyzer/src/main_loop.rs
@@ -195,6 +195,7 @@ pub fn main_loop(
             Watch(!config.use_client_watching),
             options,
             feature_flags,
+            config.additional_out_dirs,
         )
     };
 
diff --git a/crates/rust-analyzer/src/world.rs b/crates/rust-analyzer/src/world.rs
index 6f394055a2..ac4395617e 100644
--- a/crates/rust-analyzer/src/world.rs
+++ b/crates/rust-analyzer/src/world.rs
@@ -76,6 +76,7 @@ impl WorldState {
         watch: Watch,
         options: Options,
         feature_flags: FeatureFlags,
+        additional_out_dirs: FxHashMap<String, String>,
     ) -> WorldState {
         let mut change = AnalysisChange::new();
 
diff --git a/editors/code/package.json b/editors/code/package.json
index 7a4a93e303..b856729d31 100644
--- a/editors/code/package.json
+++ b/editors/code/package.json
@@ -224,6 +224,11 @@
                     "default": true,
                     "description": "Whether to ask for permission before downloading any files from the Internet"
                 },
+                "rust-analyzer.additionalOutDirs": {
+                    "type": "object",
+                    "default": {},
+                    "markdownDescription": "Fine grained controls for OUT_DIR `env!(\"OUT_DIR\")` variable. e.g. `{\"foo\":\"/path/to/foo\"}`, "
+                },
                 "rust-analyzer.serverPath": {
                     "type": [
                         "null",
diff --git a/editors/code/src/client.ts b/editors/code/src/client.ts
index 540f7c9ea7..6ce3b9235c 100644
--- a/editors/code/src/client.ts
+++ b/editors/code/src/client.ts
@@ -37,6 +37,7 @@ export async function createClient(config: Config, serverPath: string): Promise<
             excludeGlobs: config.excludeGlobs,
             useClientWatching: config.useClientWatching,
             featureFlags: config.featureFlags,
+            additionalOutDirs: config.additionalOutDirs,
             withSysroot: config.withSysroot,
             cargoFeatures: config.cargoFeatures,
             rustfmtArgs: config.rustfmtArgs,
diff --git a/editors/code/src/config.ts b/editors/code/src/config.ts
index b72206d3cb..3ade7e900f 100644
--- a/editors/code/src/config.ts
+++ b/editors/code/src/config.ts
@@ -154,6 +154,7 @@ export class Config {
     get excludeGlobs() { return this.cfg.get("excludeGlobs") as string[]; }
     get useClientWatching() { return this.cfg.get("useClientWatching") as boolean; }
     get featureFlags() { return this.cfg.get("featureFlags") as Record<string, boolean>; }
+    get additionalOutDirs() { return this.cfg.get("additionalOutDirs") as Record<string, string>; }
     get rustfmtArgs() { return this.cfg.get("rustfmtArgs") as string[]; }
 
     get cargoWatchOptions(): CargoWatchOptions {