diff --git a/linux/nix/default.nix b/linux/nix/default.nix
index 7e69e46..8f09dbc 100644
--- a/linux/nix/default.nix
+++ b/linux/nix/default.nix
@@ -65,6 +65,9 @@
       apps =
         let
           buildEnv = import ./build_env.nix { inherit pkgs lib; };
+          testEnv = buildEnv.env // {
+            DBUS_SESSION_CONFIG = "${pkgs.dbus}/share/dbus-1/session.conf";
+          };
           e2e = pkgs.writeShellApplication {
             name = "nexus-e2e";
             runtimeInputs =
@@ -75,7 +78,7 @@
                 curl
                 dbus
               ]);
-            runtimeEnv = buildEnv.env;
+            runtimeEnv = testEnv;
             text = builtins.readFile ./e2e.sh;
           };
           screenshots = pkgs.writeShellApplication {
@@ -87,7 +90,7 @@
                 oxipng
                 pngquant
               ]);
-            runtimeEnv = buildEnv.env;
+            runtimeEnv = testEnv;
             text = builtins.readFile ./screenshots.sh;
           };
 
diff --git a/linux/nix/e2e.sh b/linux/nix/e2e.sh
index 6cc9f09..585712b 100755
--- a/linux/nix/e2e.sh
+++ b/linux/nix/e2e.sh
@@ -69,7 +69,7 @@ for file in "${files[@]}"; do
     name="$(basename "$file" .dart)"
     mkdir -p "$work/$name/data" "$work/$name/cache"
     XDG_DATA_HOME="$work/$name/data" XDG_CACHE_HOME="$work/$name/cache" \
-        dbus-run-session -- \
+        dbus-run-session --config-file="$DBUS_SESSION_CONFIG" -- \
         flutter test "$file" -d linux \
         --dart-define="NEXUS_E2E_HOMESERVER=$homeserver" "${flutter_args[@]}" ||
         status=$?
diff --git a/linux/nix/screenshots.sh b/linux/nix/screenshots.sh
index cdf18ff..f3dced6 100644
--- a/linux/nix/screenshots.sh
+++ b/linux/nix/screenshots.sh
@@ -12,7 +12,7 @@ GOCACHE="$(go env GOCACHE)"
 export GOCACHE
 
 XDG_DATA_HOME="$work/data" XDG_CACHE_HOME="$work/cache" \
-    dbus-run-session -- \
+    dbus-run-session --config-file="$DBUS_SESSION_CONFIG" -- \
     flutter test integration_test/screenshots/screenshots_test.dart -d linux \
     --dart-define="SCREENSHOTS_DIR=$work/out" "$@"