diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index a241dd4..cef1a6b 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -71,10 +71,6 @@ jobs:
     if: github.repository_owner == 'aarnphm'
     steps:
       - uses: actions/download-artifact@v3
-      - name: Display structure of downloaded files
-        run: |
-          apt-get install -y tree
-          tree
       - name: Publish built wheels
         uses: pypa/gh-action-pypi-publish@release/v1
         if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
diff --git a/nix/sources.json b/nix/sources.json
index 0bd0fae..452c2a4 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -5,10 +5,10 @@
         "homepage": "",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "17c86704733b93dd1251e77d53f4d0569550a8ff",
-        "sha256": "0x30qzkxximfz2qd6by03ql9605n52hckaf6v2l4gfzkmh04hs1c",
+        "rev": "501b4fa43992e3297dc00135cfe35ec2be5be969",
+        "sha256": "1k2whg2p3d71jb2qqnj3fmq7vid1j932k6rv2bhhla019p2lcrd2",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/17c86704733b93dd1251e77d53f4d0569550a8ff.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/501b4fa43992e3297dc00135cfe35ec2be5be969.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }