diff --git a/Cargo.toml b/Cargo.toml
index 7b32574d..f4989290 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,6 @@
 [workspace]
 members = ["cli", "lib", "xtask"]
+resolver = "2"
 
 [profile.dev]
 opt-level = 1 # No optimizations are too slow for us.
diff --git a/lib/src/privtests.rs b/lib/src/privtests.rs
index d1c996a1..ea541d2e 100644
--- a/lib/src/privtests.rs
+++ b/lib/src/privtests.rs
@@ -157,8 +157,6 @@ fn test_install_filesystem(image: &str, blockdev: &Utf8Path) -> Result<()> {
 
     cmd!(sh, "umount -R {mountpoint}").run()?;
 
-    drop(mountpoint);
-
     Ok(())
 }