diff --git a/bin/pungi-gather b/bin/pungi-gather
index 9bbda922..a497edfd 100755
--- a/bin/pungi-gather
+++ b/bin/pungi-gather
@@ -137,7 +137,7 @@ def main(persistdir, cachedir):
 
 def _get_flags(gather_obj, pkg):
     flags = gather_obj.result_package_flags.get(pkg, [])
-    flags = "(%s)" % ",".join(sorted(f.name for f in flags))
+    flags = "(%s)" % ",".join(sorted(f.name.replace('_', '-') for f in flags))
     return flags
 
 
diff --git a/pungi/gather_dnf.py b/pungi/gather_dnf.py
index 44f5efda..01983f4c 100644
--- a/pungi/gather_dnf.py
+++ b/pungi/gather_dnf.py
@@ -101,6 +101,7 @@ class PkgFlag(Enum):
     fulltree = 64
     multilib = 128
     langpack = 256
+    fulltree_exclude = 512
 
 
 class GatherBase(object):
@@ -277,6 +278,8 @@ class Gather(GatherBase):
                 # lookaside
                 if i.repoid in self.opts.lookaside_repos:
                     self._set_flag(i, PkgFlag.lookaside)
+                if i.sourcerpm.rsplit('-', 2)[0] in self.opts.fulltree_excludes:
+                    self._set_flag(i, PkgFlag.fulltree_exclude)
 
         self.result_binary_packages.update(added)