diff --git a/pisi/atomicoperations.py b/pisi/atomicoperations.py
index 1745d6b7..cf54e3c6 100644
--- a/pisi/atomicoperations.py
+++ b/pisi/atomicoperations.py
@@ -240,15 +240,19 @@ class Install(AtomicOperation):
         self.config_later = False
         if ctx.comar:
             import pisi.comariface
-            ctx.ui.notify(pisi.ui.configuring, package = self.pkginfo, files = self.files)
-            pisi.comariface.post_install(
-                self.pkginfo.name,
-                self.metadata.package.providesComar,
-                self.package.comar_dir(),
-                os.path.join(self.package.pkg_dir(), ctx.const.metadata_xml),
-                os.path.join(self.package.pkg_dir(), ctx.const.files_xml),
-            )
-            ctx.ui.notify(pisi.ui.configured, package = self.pkginfo, files = self.files)
+            try:
+                ctx.ui.notify(pisi.ui.configuring, package = self.pkginfo, files = self.files)
+                pisi.comariface.post_install(
+                    self.pkginfo.name,
+                    self.metadata.package.providesComar,
+                    self.package.comar_dir(),
+                    os.path.join(self.package.pkg_dir(), ctx.const.metadata_xml),
+                    os.path.join(self.package.pkg_dir(), ctx.const.files_xml),
+                    )
+                ctx.ui.notify(pisi.ui.configured, package = self.pkginfo, files = self.files)
+            except pisi.comariface.Error:
+                ctx.ui.warning(_('%s configuration failed.') % self.pkginfo.name)
+                self.config_later = True
         else:
             self.config_later = True
 
diff --git a/pisi/installdb.py b/pisi/installdb.py
index 369cdca2..9e36be74 100644
--- a/pisi/installdb.py
+++ b/pisi/installdb.py
@@ -189,6 +189,8 @@ class InstallDB:
             info = self.d.get(pkg, txn)
             info.state = 'r'
             self.d.put(pkg, info, txn)
+            if self.dp.has_key(pkg):
+                self.dp.delete(pkg, txn)
         self.d.txn_proc(proc, txn)
 
     def purge(self, pkg, txn = None):