https://github.com/rust-lang/cargo/issues/2937
--- a/src/cargo/util/flock.rs
+++ b/src/cargo/util/flock.rs
@@ -282,7 +282,7 @@
         human(format!("failed to lock file: {}", path.display()))
     });
 
-    #[cfg(target_os = "linux")]
+    #[cfg(all(target_os = "linux", not(target_env = "musl")))]
     fn is_on_nfs_mount(path: &Path) -> bool {
         use std::ffi::CString;
         use std::mem;
@@ -302,7 +302,7 @@
         }
     }
 
-    #[cfg(not(target_os = "linux"))]
+    #[cfg(any(not(target_os = "linux"), target_env = "musl"))]
     fn is_on_nfs_mount(_path: &Path) -> bool {
         false
     }