diff --git a/pkgs/by-name/oc/ockam/package.nix b/pkgs/by-name/oc/ockam/package.nix
index a3c42b9ddf93..adca52d1536a 100644
--- a/pkgs/by-name/oc/ockam/package.nix
+++ b/pkgs/by-name/oc/ockam/package.nix
@@ -38,6 +38,8 @@ rustPlatform.buildRustPackage {
   # too many tests fail for now
   doCheck = false;
 
+  cargoBuildFlags = [ "-p ockam" ];
+
   meta = with lib; {
     description = "Orchestrate end-to-end encryption, cryptographic identities, mutual authentication, and authorization policies between distributed applications – at massive scale";
     homepage = "https://github.com/build-trust/ockam";