diff --git a/locales/en.json b/locales/en.json
index 8dac6e799..6e6ed6daa 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -19,7 +19,7 @@
     "app_incompatible": "The app is incompatible with your YunoHost version",
     "app_install_files_invalid": "Invalid installation files",
     "app_location_already_used": "An app is already installed in this location",
-    "app_location_install_failed": "Unable to install the app in this location",
+    "app_location_install_failed": "Unable to install the app in this location because it conflit with the app '{other_app}' already installed on '{other_path}'",
     "app_location_unavailable": "This url is not available or conflicts with an already installed app",
     "app_manifest_invalid": "Invalid app manifest: {error}",
     "app_no_upgrade": "No app to upgrade",
diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index 403e76cc4..5599c0d53 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -1169,10 +1169,12 @@ def app_checkurl(auth, url, app=None):
                 continue
             if path == p:
                 raise MoulinetteError(errno.EINVAL,
-                                      m18n.n('app_location_already_used'))
+                                      m18n.n('app_location_already_used',
+                                             app=a["id"], path=path))
             elif path.startswith(p) or p.startswith(path):
                 raise MoulinetteError(errno.EPERM,
-                                      m18n.n('app_location_install_failed'))
+                                      m18n.n('app_location_install_failed',
+                                             other_path=p, other_app=a['id']))
 
     if app is not None and not installed:
         app_setting(app, 'domain', value=domain)