diff --git a/flake.nix b/flake.nix
index 9149a1f..cd3f808 100644
--- a/flake.nix
+++ b/flake.nix
@@ -19,7 +19,7 @@
       packages."${cargoToml.package.name}" = naersk-lib.buildPackage {
         pname = "${cargoToml.package.name}";
         root = ./.;
-        buildInputs = [ pkgs.openssl ];
+        buildInputs = [ pkgs.openssl pkgs.pkgconfig ];
       };
       defaultPackage = packages."${cargoToml.package.name}";
     });