diff --git a/shell.nix b/shell.nix
index 3946703..0497c9d 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,9 +1,11 @@
 { pkgs ? import <nixpkgs> {} }:
 pkgs.mkShell {
   buildInputs = [
+    pkgs.curl
     pkgs.ghostscript
     pkgs.gnumake
     pkgs.gnused
     pkgs.sqlite
+    pkgs.unzip
   ];
 }