diff --git a/src/cargo/ops/cargo_rustc/output_depinfo.rs b/src/cargo/ops/cargo_rustc/output_depinfo.rs
index 399013f98..6daf58141 100644
--- a/src/cargo/ops/cargo_rustc/output_depinfo.rs
+++ b/src/cargo/ops/cargo_rustc/output_depinfo.rs
@@ -71,9 +71,10 @@ pub fn output_depinfo<'a, 'b>(context: &mut Context<'a, 'b>, unit: &Unit<'a>) ->
     let mut visited = HashSet::new();
     let success = add_deps_for_unit(&mut deps, context, unit, &mut visited).is_ok();
     let basedir_string;
-    let basedir = match context.config.get_string("build.dep-info-basedir")? {
+    let basedir = match context.config.get_path("build.dep-info-basedir")? {
         Some(value) => {
-            basedir_string = value.val;
+            basedir_string = value.val.as_os_str().to_str().
+              ok_or_else(|| internal("build.dep-info-basedir path not utf-8"))?.to_string();
             Some(basedir_string.as_str())
         }
         None => None,