diff --git a/src/importer/sources/bottles_source.py b/src/importer/sources/bottles_source.py
index 2905fb3..c1af459 100644
--- a/src/importer/sources/bottles_source.py
+++ b/src/importer/sources/bottles_source.py
@@ -86,13 +86,14 @@ class BottlesSource(URLExecutableSource):
     name = "Bottles"
     iterator_class = BottlesSourceIterator
     url_format = 'bottles:run/"{bottle_name}"/"{game_name}"'
-    available_on = set(("linux",))
+    available_on = {"linux"}
 
     data_location = Location(
         schema_key="bottles-location",
         candidates=(
-            "~/.var/app/com.usebottles.bottles/data/bottles/",
+            shared.flatpak_dir / "com.usebottles.bottles" / "data" / "bottles",
             shared.data_dir / "bottles/",
+            shared.home / ".local" / "share" / "bottles",
         ),
         paths={
             "library.yml": (False, "library.yml"),
diff --git a/src/importer/sources/flatpak_source.py b/src/importer/sources/flatpak_source.py
index d793ecb..726edaf 100644
--- a/src/importer/sources/flatpak_source.py
+++ b/src/importer/sources/flatpak_source.py
@@ -116,7 +116,7 @@ class FlatpakSource(Source):
     name = "Flatpak"
     iterator_class = FlatpakSourceIterator
     executable_format = "flatpak run {flatpak_id}"
-    available_on = set(("linux",))
+    available_on = {"linux"}
 
     data_location = Location(
         schema_key="flatpak-location",
diff --git a/src/importer/sources/heroic_source.py b/src/importer/sources/heroic_source.py
index ed501c2..9048ca8 100644
--- a/src/importer/sources/heroic_source.py
+++ b/src/importer/sources/heroic_source.py
@@ -137,13 +137,14 @@ class HeroicSource(URLExecutableSource):
     name = "Heroic"
     iterator_class = HeroicSourceIterator
     url_format = "heroic://launch/{app_name}"
-    available_on = set(("linux", "win32"))
+    available_on = {"linux", "win32"}
 
     config_location = Location(
         schema_key="heroic-location",
         candidates=(
-            "~/.var/app/com.heroicgameslauncher.hgl/config/heroic/",
+            shared.flatpak_dir / "com.heroicgameslauncher.hgl" / "config" / "heroic",
             shared.config_dir / "heroic",
+            shared.home / ".config" / "heroic",
             shared.appdata_dir / "heroic",
         ),
         paths={
diff --git a/src/importer/sources/itch_source.py b/src/importer/sources/itch_source.py
index 0b11dcb..841c2e0 100644
--- a/src/importer/sources/itch_source.py
+++ b/src/importer/sources/itch_source.py
@@ -82,13 +82,14 @@ class ItchSource(URLExecutableSource):
     name = "Itch"
     iterator_class = ItchSourceIterator
     url_format = "itch://caves/{cave_id}/launch"
-    available_on = set(("linux", "win32"))
+    available_on = {"linux", "win32"}
 
     config_location = Location(
         schema_key="itch-location",
         candidates=(
-            "~/.var/app/io.itch.itch/config/itch/",
+            shared.flatpak_dir / "io.itch.itch" / "config" / "itch",
             shared.config_dir / "itch",
+            shared.home / ".config" / "itch",
             shared.appdata_dir / "itch",
         ),
         paths={"butler.db": (False, "db/butler.db")},
diff --git a/src/importer/sources/legendary_source.py b/src/importer/sources/legendary_source.py
index b6b15cb..2882e92 100644
--- a/src/importer/sources/legendary_source.py
+++ b/src/importer/sources/legendary_source.py
@@ -92,12 +92,15 @@ class LegendarySourceIterator(SourceIterator):
 class LegendarySource(Source):
     name = "Legendary"
     executable_format = "legendary launch {app_name}"
-    available_on = set(("linux", "win32"))
+    available_on = {"linux", "win32"}
 
     iterator_class = LegendarySourceIterator
     config_location: Location = Location(
         schema_key="legendary-location",
-        candidates=(shared.config_dir / "legendary",),
+        candidates=(
+            shared.config_dir / "legendary",
+            shared.home / ".config" / "legendary",
+        ),
         paths={
             "installed.json": (False, "installed.json"),
             "metadata": (True, "metadata"),
diff --git a/src/importer/sources/lutris_source.py b/src/importer/sources/lutris_source.py
index 17e4956..ad0bc80 100644
--- a/src/importer/sources/lutris_source.py
+++ b/src/importer/sources/lutris_source.py
@@ -93,15 +93,16 @@ class LutrisSource(URLExecutableSource):
     name = "Lutris"
     iterator_class = LutrisSourceIterator
     url_format = "lutris:rungameid/{game_id}"
-    available_on = set(("linux",))
+    available_on = {"linux"}
 
     # FIXME possible bug: location picks ~/.var... and cache_lcoation picks ~/.local...
 
     data_location = Location(
         schema_key="lutris-location",
         candidates=(
-            "~/.var/app/net.lutris.Lutris/data/lutris/",
+            shared.flatpak_dir / "net.lutris.Lutris" / "data" / "lutris",
             shared.data_dir / "lutris",
+            shared.home / ".local" / "share" / "lutris",
         ),
         paths={
             "pga.db": (False, "pga.db"),
@@ -111,8 +112,9 @@ class LutrisSource(URLExecutableSource):
     cache_location = Location(
         schema_key="lutris-cache-location",
         candidates=(
-            "~/.var/app/net.lutris.Lutris/cache/lutris/",
+            shared.flatpak_dir / "net.lutris.Lutris" / "cache" / "lutris",
             shared.cache_dir / "lutris",
+            shared.home / ".cache" / "lutris",
         ),
         paths={
             "coverart": (True, "coverart"),
diff --git a/src/importer/sources/steam_source.py b/src/importer/sources/steam_source.py
index 13d99a7..ff60d86 100644
--- a/src/importer/sources/steam_source.py
+++ b/src/importer/sources/steam_source.py
@@ -111,16 +111,16 @@ class SteamSourceIterator(SourceIterator):
 
 class SteamSource(URLExecutableSource):
     name = "Steam"
-    available_on = set(("linux", "win32"))
+    available_on = {"linux", "win32"}
     iterator_class = SteamSourceIterator
     url_format = "steam://rungameid/{game_id}"
 
     data_location = Location(
         schema_key="steam-location",
         candidates=(
-            "~/.var/app/com.valvesoftware.Steam/data/Steam/",
+            shared.flatpak_dir / "com.valvesoftware.Steam" / "data" / "Steam",
             shared.data_dir / "Steam",
-            "~/.steam",
+            shared.home / ".steam",
             shared.programfiles32_dir / "Steam",
         ),
         paths={
diff --git a/src/shared.py.in b/src/shared.py.in
index 3be3fef..bfa882c 100644
--- a/src/shared.py.in
+++ b/src/shared.py.in
@@ -20,7 +20,7 @@
 import os
 from pathlib import Path
 
-from gi.repository import Gdk, Gio
+from gi.repository import Gdk, Gio, GLib
 
 APP_ID = "@APP_ID@"
 VERSION = "@VERSION@"
@@ -31,21 +31,11 @@ SPEC_VERSION = 1.5  # The version of the game_id.json spec
 schema = Gio.Settings.new(APP_ID)
 state_schema = Gio.Settings.new(APP_ID + ".State")
 
-data_dir = (
-    Path(os.getenv("XDG_DATA_HOME"))
-    if "XDG_DATA_HOME" in os.environ
-    else Path.home() / ".local" / "share"
-)
-config_dir = (
-    Path(os.getenv("XDG_CONFIG_HOME"))
-    if "XDG_CONFIG_HOME" in os.environ
-    else Path.home() / ".config"
-)
-cache_dir = (
-    Path(os.getenv("XDG_CACHE_HOME"))
-    if "XDG_CACHE_HOME" in os.environ
-    else Path.home() / ".cache"
-)
+home = Path.home()
+data_dir = Path(GLib.get_user_data_dir())
+config_dir = Path(GLib.get_user_config_dir())
+cache_dir = Path(GLib.get_user_config_dir())
+flatpak_dir = home / ".var" / "app"
 
 games_dir = data_dir / "cartridges" / "games"
 covers_dir = data_dir / "cartridges" / "covers"