diff --git a/eintopf-radar-sync.py b/eintopf-radar-sync.py
index 3127ee0..67341cf 100644
--- a/eintopf-radar-sync.py
+++ b/eintopf-radar-sync.py
@@ -3,6 +3,7 @@
 import requests
 import json
 from bs4 import BeautifulSoup
+import os
 
 # Read environment variables (fail if missing)
 EINTOPF_URL = os.environ["EINTOPF_URL"]
diff --git a/flake.nix b/flake.nix
index 84edca3..6ca073c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -27,7 +27,6 @@
           python
           requests
           beautifulsoup4
-          pyyaml
         ];
 
         installPhase = ''
@@ -51,7 +50,6 @@
         python
         requests
         beautifulsoup4
-        pyyaml
       ];
     });