1 files changed, 4 insertions, 4 deletions
diff --git a/tvix/cli/src/nix_compat.rs b/tvix/cli/src/nix_compat.rs
index 0da3aeb212..bda2389838 100644
--- a/tvix/cli/src/nix_compat.rs
+++ b/tvix/cli/src/nix_compat.rs
@@ -34,7 +34,7 @@ impl EvalIO for NixCompatIO {
     }
 
     // Pass path imports through to `nix-store --add`
-    fn import_path(&mut self, path: &Path) -> Result<PathBuf, io::Error> {
+    fn import_path(&self, path: &Path) -> Result<PathBuf, io::Error> {
         let path = path.to_owned();
         if let Some(path) = self
             .import_cache
@@ -56,7 +56,7 @@ impl EvalIO for NixCompatIO {
     }
 
     // Pass the rest of the functions through to `Self::underlying`
-    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);
         }
@@ -64,7 +64,7 @@ impl EvalIO for NixCompatIO {
         self.underlying.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. This workaround
         // is similar to what cppnix does for passing the path
         // through.
@@ -78,7 +78,7 @@ impl EvalIO for NixCompatIO {
         self.underlying.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.underlying.read_dir(path)
     }
 }