diff --git a/pkgs/by-name/st/stalwart-mail/package.nix b/pkgs/by-name/st/stalwart-mail/package.nix
index 4f6830378082..c39e939280b6 100644
--- a/pkgs/by-name/st/stalwart-mail/package.nix
+++ b/pkgs/by-name/st/stalwart-mail/package.nix
@@ -50,6 +50,10 @@ rustPlatform.buildRustPackage (finalAttrs: {
   ]
   ++ lib.optionals (stdenv.hostPlatform.isLinux && withFoundationdb) [ foundationdb ];
 
+  nativeCheckInputs = [
+    openssl
+  ];
+
   # Issue: https://github.com/stalwartlabs/stalwart/issues/1104
   buildNoDefaultFeatures = true;
   buildFeatures = [