diff --git a/rust/ql/lib/codeql/rust/frameworks/stdlib/fs.model.yml b/rust/ql/lib/codeql/rust/frameworks/stdlib/fs.model.yml
index 8be4fdc05bf..6216f79ea85 100644
--- a/rust/ql/lib/codeql/rust/frameworks/stdlib/fs.model.yml
+++ b/rust/ql/lib/codeql/rust/frameworks/stdlib/fs.model.yml
@@ -59,27 +59,25 @@ extensions:
       - ["std::fs::canonicalize", "Argument[0].OptionalStep[normalize-path]", "ReturnValue.Field[core::result::Result::Ok(0)]", "taint", "manual"]
       - ["std::fs::canonicalize", "Argument[0].OptionalBarrier[normalize-path]", "ReturnValue.Field[core::result::Result::Ok(0)]", "taint", "manual"]
       - ["<std::path::PathBuf>::as_path", "Argument[self].Reference", "ReturnValue.Reference", "value", "manual"]
-      - ["<std::path::PathBuf>::as_mut_os_string", "Argument[Self].Reference", "ReturnValue.Reference", "value", "manual"]
-      - ["<std::path::PathBuf>::into_os_string", "Argument[Self]", "ReturnValue", "value", "manual"]
-      - ["<std::path::PathBuf>::into_boxed_path", "Argument[Self]", "ReturnValue.Reference", "value", "manual"]
+      - ["<std::path::PathBuf>::into_boxed_path", "Argument[self]", "ReturnValue.Field[alloc::boxed::Box(0)]", "taint", "manual"]
       - ["<std::path::Path>::new", "Argument[0].Reference", "ReturnValue.Reference", "value", "manual"]
       - ["<std::path::Path>::join", "Argument[self]", "ReturnValue", "taint", "manual"]
       - ["<std::path::Path>::join", "Argument[0]", "ReturnValue", "taint", "manual"]
-      - ["<std::path::Path>::as_os_string", "Argument[Self].Reference", "ReturnValue.Reference", "value", "manual"]
-      - ["<std::path::Path>::as_mut_os_string", "Argument[Self].Reference", "ReturnValue.Reference", "value", "manual"]
+      - ["<std::path::Path>::as_os_str", "Argument[self].Reference.Field[std::path::Path::inner]", "ReturnValue.Reference", "value", "manual"]
+      - ["<std::path::Path>::as_mut_os_str", "Argument[self].Reference.Field[std::path::Path::inner]", "ReturnValue.Reference", "value", "manual"]
       - ["<std::path::Path>::canonicalize", "Argument[self].Reference.OptionalStep[normalize-path]", "ReturnValue.Field[core::result::Result::Ok(0)]", "taint", "manual"]
       - ["<std::path::Path>::canonicalize", "Argument[self].Reference.OptionalBarrier[normalize-path]", "ReturnValue.Field[core::result::Result::Ok(0)]", "taint", "manual"]
-      - ["<std::path::Path>::extension", "Argument[Self].Reference", "ReturnValue.Field[core::option::Option::Some(0)].Reference", "taint", "manual"]
-      - ["<std::path::Path>::file_name", "Argument[Self].Reference", "ReturnValue.Field[core::option::Option::Some(0)].Reference", "taint", "manual"]
-      - ["<std::path::Path>::file_prefix", "Argument[Self].Reference", "ReturnValue.Field[core::option::Option::Some(0)].Reference", "taint", "manual"]
-      - ["<std::path::Path>::file_stem", "Argument[Self].Reference", "ReturnValue.Field[core::option::Option::Some(0)].Reference", "taint", "manual"]
-      - ["<std::path::Path>::into_path_buf", "Argument[Self].Reference", "ReturnValue", "value", "manual"]
-      - ["<std::path::Path>::parent", "Argument[Self].Reference", "ReturnValue.Field[core::option::Option::Some(0)].Reference", "taint", "manual"]
-      - ["<std::path::Path>::to_path_buf", "Argument[Self].Reference", "ReturnValue", "value", "manual"]
-      - ["<std::path::Path>::to_str", "Argument[Self].Reference", "ReturnValue.Field[core::option::Option::Some(0)].Reference", "value", "manual"]
-      - ["<std::path::Path>::with_added_extension", "Argument[Self].Reference", "ReturnValue", "taint", "manual"]
-      - ["<std::path::Path>::with_extension", "Argument[Self].Reference", "ReturnValue", "taint", "manual"]
-      - ["<std::path::Path>::with_file_name", "Argument[Self].Reference", "ReturnValue", "taint", "manual"]
+      - ["<std::path::Path>::extension", "Argument[self].Reference", "ReturnValue.Field[core::option::Option::Some(0)].Reference", "taint", "manual"]
+      - ["<std::path::Path>::file_name", "Argument[self].Reference", "ReturnValue.Field[core::option::Option::Some(0)].Reference", "taint", "manual"]
+      - ["<std::path::Path>::file_prefix", "Argument[self].Reference", "ReturnValue.Field[core::option::Option::Some(0)].Reference", "taint", "manual"]
+      - ["<std::path::Path>::file_stem", "Argument[self].Reference", "ReturnValue.Field[core::option::Option::Some(0)].Reference", "taint", "manual"]
+      - ["<std::path::Path>::into_path_buf", "Argument[self].Field[alloc::boxed::Box(0)]", "ReturnValue", "value", "manual"]
+      - ["<std::path::Path>::parent", "Argument[self].Reference", "ReturnValue.Field[core::option::Option::Some(0)].Reference", "taint", "manual"]
+      - ["<std::path::Path>::to_path_buf", "Argument[self].Reference", "ReturnValue", "value", "manual"]
+      - ["<std::path::Path>::to_str", "Argument[self].Reference", "ReturnValue.Field[core::option::Option::Some(0)].Reference", "value", "manual"]
+      - ["<std::path::Path>::with_added_extension", "Argument[self].Reference", "ReturnValue", "taint", "manual"]
+      - ["<std::path::Path>::with_extension", "Argument[self].Reference", "ReturnValue", "taint", "manual"]
+      - ["<std::path::Path>::with_file_name", "Argument[self].Reference", "ReturnValue", "taint", "manual"]
       - ["<std::path::Path>::with_file_name", "Argument[0]", "ReturnValue", "taint", "manual"]
       - ["<std::fs::Metadata>::accessed", "Argument[self].Reference", "ReturnValue.Field[core::result::Result::Ok(0)]", "taint", "manual"]
       - ["<std::fs::Metadata>::created", "Argument[self].Reference", "ReturnValue.Field[core::result::Result::Ok(0)]", "taint", "manual"]