diff --git a/library/std/src/os/mod.rs b/library/std/src/os/mod.rs
index b1f4b02ff91..fb30a9a3c07 100644
--- a/library/std/src/os/mod.rs
+++ b/library/std/src/os/mod.rs
@@ -142,7 +142,7 @@ pub mod vxworks;
 #[cfg(target_os = "watchos")]
 pub(crate) mod watchos;
 #[cfg(target_os = "yggdrasil")]
-pub(crate) mod yggdrasil;
+pub mod yggdrasil;
 
 #[cfg(any(unix, target_os = "wasi", doc))]
 pub mod fd;
diff --git a/library/std/src/os/yggdrasil/io.rs b/library/std/src/os/yggdrasil/io.rs
index cb4a0a42193..571f774369b 100644
--- a/library/std/src/os/yggdrasil/io.rs
+++ b/library/std/src/os/yggdrasil/io.rs
@@ -47,7 +47,7 @@ mod net {
 }
 
 pub mod raw {
-    pub type RawFd = yggdrasil_rt::RawFd;
+    pub type RawFd = yggdrasil_rt::io::RawFd;
 
     pub trait AsRawFd {
         fn as_raw_fd(&self) -> RawFd;
diff --git a/library/std/src/os/yggdrasil/mod.rs b/library/std/src/os/yggdrasil/mod.rs
index e3487a20aae..568faf5b347 100644
--- a/library/std/src/os/yggdrasil/mod.rs
+++ b/library/std/src/os/yggdrasil/mod.rs
@@ -1,3 +1,19 @@
-#![stable(feature = "os_fd", since = "1.66.0")]
+#![stable(feature = "os", since = "1.0.0")]
 
-pub mod io;
+pub(crate) mod io;
+
+#[stable(feature = "yggdrasil_platform", since = "1.70.0")]
+pub use yggdrasil_rt::{
+    io::{MountOptions, UnmountOptions},
+    Error,
+};
+
+#[stable(feature = "yggdrasil_platform", since = "1.70.0")]
+pub unsafe fn mount(options: MountOptions) -> Result<(), Error> {
+    yggdrasil_rt::sys::mount(&options)
+}
+
+#[stable(feature = "yggdrasil_platform", since = "1.70.0")]
+pub unsafe fn unmount(options: UnmountOptions) -> Result<(), Error> {
+    yggdrasil_rt::sys::unmount(&options)
+}
diff --git a/library/std/src/sys/yggdrasil/fs/file.rs b/library/std/src/sys/yggdrasil/fs/file.rs
index f3f3f4d3d90..91df078010d 100644
--- a/library/std/src/sys/yggdrasil/fs/file.rs
+++ b/library/std/src/sys/yggdrasil/fs/file.rs
@@ -52,9 +52,9 @@ impl OpenOptions {
     }
 }
 
-impl Into<yggdrasil_rt::OpenFlags> for OpenOptions {
-    fn into(self) -> yggdrasil_rt::OpenFlags {
-        let mut res = yggdrasil_rt::OpenFlags::new();
+impl Into<yggdrasil_rt::io::OpenFlags> for OpenOptions {
+    fn into(self) -> yggdrasil_rt::io::OpenFlags {
+        let mut res = yggdrasil_rt::io::OpenFlags::new();
         if self.read {
             res = res.read();
         }
diff --git a/library/std/src/sys/yggdrasil/mod.rs b/library/std/src/sys/yggdrasil/mod.rs
index 4ebf0349e25..8e7b54d62bc 100644
--- a/library/std/src/sys/yggdrasil/mod.rs
+++ b/library/std/src/sys/yggdrasil/mod.rs
@@ -91,6 +91,9 @@ fn cvt_io_err(e: OsError) -> crate::io::Error {
         OsError::NotImplemented => {
             crate::io::const_io_error!(ErrorKind::Unsupported, "feature not implemented")
         }
+        OsError::NotADirectory => {
+            crate::io::const_io_error!(ErrorKind::NotADirectory, "not a directory")
+        }
     }
 }
 
diff --git a/library/std/src/sys/yggdrasil/stdio.rs b/library/std/src/sys/yggdrasil/stdio.rs
index a64a51abd30..e9561dd71c9 100644
--- a/library/std/src/sys/yggdrasil/stdio.rs
+++ b/library/std/src/sys/yggdrasil/stdio.rs
@@ -1,6 +1,6 @@
 use crate::io;
 use crate::io::{IoSlice, IoSliceMut};
-use yggdrasil_rt::RawFd;
+use yggdrasil_rt::io::RawFd;
 
 // const FILENO_STDIN: i32 = 0;