diff --git a/pkgs/epnix/support/ads/default.nix b/pkgs/epnix/support/ads/default.nix
index bcce25a6..0e939d59 100644
--- a/pkgs/epnix/support/ads/default.nix
+++ b/pkgs/epnix/support/ads/default.nix
@@ -23,12 +23,12 @@ mkEpicsPackage rec {
     sha256 = "sha256-NCuT2EpEBEVMzQw4cU8l0AUYVXa9fUtEOGpynG5Z85M=";
   };
 
+  # Patch used to fix parallelization compilation issue caused by EPNix compare to standard compilation.
+  # Wait for PR https://gitlab.esss.lu.se/epics-modules/epics-twincat-ads/-/merge_requests/3
   patches = [./fixDep.patch];
 
   propagatedBuildInputs = with epnix.support; [asyn calc];
 
-  doCheck = false;
-
   preBuild = ''
     touch configure/RELEASE_PATHS.local
     touch configure/RELEASE_LIBS.local
@@ -37,6 +37,8 @@ mkEpicsPackage rec {
   meta = {
     description = "Module providing EPICS support for ADS Protocol (Automation Device Specification)";
     homepage = "https://www.beckhoff.com/en-en/products/automation/twincat/tc1xxx-twincat-3-base/tc1000.html";
+    # Wait for ESS team answer about the license :  https://gitlab.esss.lu.se/epics-modules/epics-twincat-ads/-/issues/1
+    # lib.licenses.free don't work in EPNIX for now
     license = epnixLib.licenses.epics;
     maintainers = with epnixLib.maintainers; [agaget];
   };