fix: flatpak dependency

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [0.5.1]
+### Fixes:
+- flatpak dependency
+
 ## [0.5.0] - 2019-08-06
 ### Improvements
 - search results sorting takes an average of 35% less time, reaching 60% in some scenarios

fpakman/core/flatpak/controller.py

@@ -181,8 +181,9 @@ class FlatpakManager(ApplicationManager):
         return updates
 
     def list_warnings(self) -> List[str]:
-        if not flatpak.has_remotes_set():
-            return [self.locale_keys['flatpak.notification.no_remotes']]
+        if flatpak.is_installed():
+            if not flatpak.has_remotes_set():
+                return [self.locale_keys['flatpak.notification.no_remotes']]
 
     def list_suggestions(self, limit: int) -> List[FlatpakApplication]: