diff --git a/src/python/jw/pkg/lib/Distro.py b/src/python/jw/pkg/lib/Distro.py
index f041a8af..f1019cbe 100644
--- a/src/python/jw/pkg/lib/Distro.py
+++ b/src/python/jw/pkg/lib/Distro.py
@@ -354,13 +354,15 @@ class Distro(abc.ABC):
 
     # Download first and then install. Override if Distro knows better.
     async def _install_urls(self, urls: Iterable[str], only_update: bool) -> None:
-        import tempfile
         from .util import copy
-        with tempfile.TemporaryDirectory(prefix='jw-pkg-') as tmp:
-            paths: list[str] = []
-            for url in urls:
-                paths.append(await copy(url, tmp))
+        tmp: str|None = None
+        try:
+            tmp = await self.__exec_context.mktemp('/tmp/jw-pkg-XXXXXX', directory=True)
+            paths = await copy(urls, self.__exec_context.uri.scheme_plus_authority + tmp)
             await self._install_local_files(paths, only_update=only_update)
+        finally:
+            if tmp is not None:
+                await self.__exec_context.erase(tmp)
 
     # Default implementation installs in two steps:
     # - Download URLs into local directories and install