diff --git a/nix/sources.json b/nix/sources.json
index 85c1fbddd1b..6bb0cb580c7 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -101,10 +101,10 @@
         "homepage": "https://wasi.dev",
         "owner": "WebAssembly",
         "repo": "wasi-libc",
-        "rev": "c5264e2bbe532994d06b039005f2af91bedcc1a6",
-        "sha256": "1skw2jqzaidr2zbzbjw32b36xvqniwf4if8cr4kbpp8vjvh7j2lr",
+        "rev": "b9ef79d7dbd47c6c5bafdae760823467c2f60b70",
+        "sha256": "048x1kixy1npd39yp72856908c63b12wwfx3x1krzrzb58z1cq6q",
         "type": "tarball",
-        "url": "https://github.com/WebAssembly/wasi-libc/archive/c5264e2bbe532994d06b039005f2af91bedcc1a6.tar.gz",
+        "url": "https://github.com/WebAssembly/wasi-libc/archive/b9ef79d7dbd47c6c5bafdae760823467c2f60b70.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs": {