1 files changed, 4 insertions, 4 deletions
diff --git a/tvix/cli/src/tvix_io.rs b/tvix/cli/src/tvix_io.rs
index cc32786055..8ca660f87b 100644
--- a/tvix/cli/src/tvix_io.rs
+++ b/tvix/cli/src/tvix_io.rs
@@ -39,7 +39,7 @@ impl<T: EvalIO> EvalIO for TvixIO<T> {
         self.actual.store_dir()
     }
 
-    fn import_path(&mut self, path: &Path) -> Result<PathBuf, io::Error> {
+    fn import_path(&self, path: &Path) -> Result<PathBuf, io::Error> {
         let imported_path = self.actual.import_path(path)?;
         self.known_paths
             .borrow_mut()
@@ -48,7 +48,7 @@ impl<T: EvalIO> EvalIO for TvixIO<T> {
         Ok(imported_path)
     }
 
-    fn path_exists(&mut self, path: &Path) -> Result<bool, io::Error> {
+    fn path_exists(&self, path: &Path) -> Result<bool, io::Error> {
         if path.starts_with("/__corepkgs__") {
             return Ok(true);
         }
@@ -56,7 +56,7 @@ impl<T: EvalIO> EvalIO for TvixIO<T> {
         self.actual.path_exists(path)
     }
 
-    fn read_to_string(&mut self, path: &Path) -> Result<String, io::Error> {
+    fn read_to_string(&self, path: &Path) -> Result<String, io::Error> {
         // Bundled version of corepkgs/fetchurl.nix. The counterpart
         // of this happens in `main`, where the `nix_path` of the
         // evaluation has `nix=/__corepkgs__` added to it.
@@ -73,7 +73,7 @@ impl<T: EvalIO> EvalIO for TvixIO<T> {
         self.actual.read_to_string(path)
     }
 
-    fn read_dir(&mut self, path: &Path) -> Result<Vec<(SmolStr, FileType)>, io::Error> {
+    fn read_dir(&self, path: &Path) -> Result<Vec<(SmolStr, FileType)>, io::Error> {
         self.actual.read_dir(path)
     }
 }