diff --git a/bauh/gems/arch/controller.py b/bauh/gems/arch/controller.py
index acb7909a..a62b97a2 100644
--- a/bauh/gems/arch/controller.py
+++ b/bauh/gems/arch/controller.py
@@ -655,11 +655,8 @@ class ArchManager(SoftwareManager):
         return res
 
     def _is_wget_available(self):
-        try:
-            new_subprocess(['wget', '--version'])
-            return True
-        except FileNotFoundError:
-            return False
+        res = run_cmd('which wget')
+        return res and not res.strip().startswith('which ')
 
     def is_enabled(self) -> bool:
         return self.enabled
@@ -690,7 +687,10 @@ class ArchManager(SoftwareManager):
         self.dcache_updater.start()
         self.comp_optimizer.start()
         self.aur_index_updater.start()
-        self.categories_map = self.categories_downloader.get_categories()
+        categories = self.categories_downloader.get_categories()
+
+        if categories:
+            self.categories_map = categories
 
     def list_updates(self, internet_available: bool) -> List[PackageUpdate]:
         installed = self.read_installed(disk_loader=None, internet_available=internet_available).installed
diff --git a/bauh/gems/arch/pacman.py b/bauh/gems/arch/pacman.py
index b68ff21b..7681e2b2 100644
--- a/bauh/gems/arch/pacman.py
+++ b/bauh/gems/arch/pacman.py
@@ -1,19 +1,15 @@
 import re
-import subprocess
 from typing import List, Set
 
-from bauh.api.abstract.handler import ProcessWatcher
-from bauh.commons.system import run_cmd, new_subprocess, new_root_subprocess, SystemProcess, ProcessHandler
+from bauh.commons.system import run_cmd, new_subprocess, new_root_subprocess, SystemProcess
 
 RE_DEPS = re.compile(r'[\w\-_]+:[\s\w_\-\.]+\s+\[\w+\]')
 RE_OPTDEPS = re.compile(r'[\w\._\-]+\s*:')
 
+
 def is_enabled() -> bool:
-    try:
-        new_subprocess(['pacman', '--version'])
-        return True
-    except FileNotFoundError:
-        return False
+    res = run_cmd('which pacman')
+    return res and not res.strip().startswith('which ')
 
 
 def get_mirrors(pkgs: Set[str]) -> dict:
diff --git a/bauh/gems/snap/controller.py b/bauh/gems/snap/controller.py
index 71ad273b..affb7861 100644
--- a/bauh/gems/snap/controller.py
+++ b/bauh/gems/snap/controller.py
@@ -143,7 +143,10 @@ class SnapManager(SoftwareManager):
         return ProcessHandler(watcher).handle(SystemProcess(subproc=snap.refresh_and_stream(pkg.name, root_password)))
 
     def prepare(self):
-        self.categories = self.categories_downloader.get_categories()
+        categories = self.categories_downloader.get_categories()
+
+        if categories:
+            self.categories = categories
 
     def list_updates(self, internet_available: bool) -> List[PackageUpdate]:
         pass