diff --git a/hosts/yodaNas/host-specific.nix b/hosts/yodaNas/host-specific.nix
index acf9d17..dae66a8 100644
--- a/hosts/yodaNas/host-specific.nix
+++ b/hosts/yodaNas/host-specific.nix
@@ -22,6 +22,26 @@ let
         ];
       }
     )
+    # de-p1st-monitor is not (yet) packaged, thus we build it from PyPI
+    (
+      buildPythonPackage rec {
+        pname = "de.p1st.monitor";
+        version = "0.10.5";
+        # https://nixos.wiki/wiki/Packaging/Python#Fix_Missing_setup.py
+        format = "pyproject";
+        src = fetchPypi {
+          inherit pname version;
+          sha256 = "sha256-WF/+oUQjSaQY+p+1uo2i35CciGCKrB4hn9a3m8oEXpI=";
+        };
+        propagatedBuildInputs = [
+          # Dependencies
+          pkgs.python3Packages.psutil
+          # Build dependencies
+          build
+          twine
+        ];
+      }
+    )
   ];
 in
 {
@@ -31,10 +51,13 @@ in
     "/mnt/backup".options = [ "compress=zstd" "noatime" "commit=120" ];
   };
 
-  # Install netcup-dns.
+  # Install de.p1st.monitor and netcup-dns Python packages.
   environment.systemPackages = [
     (pkgs.python3.withPackages my-python-packages)
+    # Dependency of de.p1st.monitor.
+    pkgs.smartmontools
   ];
+
   # Configure netcup-dns.
   # Create file `/etc/netcup-dns/netcup-dns-95191.json`.
   deployment.keys."netcup-dns-95191.json" = {