diff --git a/pungi/phases/gather/__init__.py b/pungi/phases/gather/__init__.py
index 7ed1619f..be7ebf74 100644
--- a/pungi/phases/gather/__init__.py
+++ b/pungi/phases/gather/__init__.py
@@ -448,6 +448,9 @@ def _gather_variants(result, compose, variant_type, package_sets, exclude_fulltr
             pkg_map = gather_packages(compose, arch, variant, package_sets, fulltree_excludes=fulltree_excludes)
             result.setdefault(arch, {})[variant.uid] = pkg_map
 
+        # Remove the module -> pkgset mapping to save memory
+        variant.nsvc_to_pkgset = None
+
 
 def _trim_variants(result, compose, variant_type, remove_pkgs=None, move_to_parent=True):
     """Trim all varians of given type.
diff --git a/pungi/phases/gather/methods/method_deps.py b/pungi/phases/gather/methods/method_deps.py
index 44fb60b2..3c7b54fb 100644
--- a/pungi/phases/gather/methods/method_deps.py
+++ b/pungi/phases/gather/methods/method_deps.py
@@ -145,6 +145,9 @@ def write_pungi_config(compose, arch, variant, packages, groups, filter_packages
                     package_whitelist.add(
                         '{0.name}-{1}:{0.version}-{0.release}'.format(rpm_obj, rpm_obj.epoch or 0))
 
+        # Drop the packageset to hopefully save some memory
+        variant.pkgset = None
+
     pungi_wrapper.write_kickstart(
         ks_path=pungi_cfg, repos=repos, groups=groups, packages=packages_str,
         exclude_packages=filter_packages_str,