1 files changed, 11 insertions, 1 deletions
diff --git a/tvix/eval/src/builtins/impure.rs b/tvix/eval/src/builtins/impure.rs
index 01a0939372..904706dc65 100644
--- a/tvix/eval/src/builtins/impure.rs
+++ b/tvix/eval/src/builtins/impure.rs
@@ -4,7 +4,7 @@ use smol_str::SmolStr;
 use std::{
     collections::BTreeMap,
     env,
-    rc::Weak,
+    rc::{Rc, Weak},
     time::{SystemTime, UNIX_EPOCH},
 };
 
@@ -74,6 +74,16 @@ pub(super) fn builtins() -> BTreeMap<&'static str, Value> {
         .map(|b| (b.name(), Value::Builtin(b)))
         .collect();
 
+    map.insert(
+        "storeDir",
+        Value::Thunk(Thunk::new_suspended_native(Rc::new(Box::new(
+            |vm: &mut VM| match vm.io().store_dir() {
+                None => Ok(Value::Null),
+                Some(dir) => Ok(Value::String(dir.into())),
+            },
+        )))),
+    );
+
     // currentTime pins the time at which evaluation was started
     {
         let seconds = match SystemTime::now().duration_since(UNIX_EPOCH) {