diff --git a/nixos/configurations/adrastea/default.nix b/nixos/configurations/adrastea/default.nix
index c511825..0e305be 100644
--- a/nixos/configurations/adrastea/default.nix
+++ b/nixos/configurations/adrastea/default.nix
@@ -125,6 +125,12 @@
 
     nixd
 
+    # Archive utilities.
+    zip
+    unzip
+    rar
+    unrar
+
     lean4
     elan