diff --git a/pkgs/desktops/lomiri/default.nix b/pkgs/desktops/lomiri/default.nix
index c4fc4757226e..b9c12671546f 100644
--- a/pkgs/desktops/lomiri/default.nix
+++ b/pkgs/desktops/lomiri/default.nix
@@ -48,6 +48,7 @@ let
         withDocumentation = !useQt6;
       };
       lomiri-indicator-network = callPackage ./services/lomiri-indicator-network { };
+      lomiri-thumbnailer = callPackage ./services/lomiri-thumbnailer { };
       lomiri-url-dispatcher = callPackage ./services/lomiri-url-dispatcher { };
     }
     // lib.optionalAttrs useQt6 {
@@ -97,7 +98,6 @@ let
       lomiri-indicator-datetime = ayatana-indicator-datetime.override { enableLomiriFeatures = true; };
       lomiri-polkit-agent = callPackage ./services/lomiri-polkit-agent { };
       lomiri-telephony-service = callPackage ./services/lomiri-telephony-service { };
-      lomiri-thumbnailer = callPackage ./services/lomiri-thumbnailer { };
       mediascanner2 = callPackage ./services/mediascanner2 { };
     };
 in
diff --git a/pkgs/desktops/lomiri/services/lomiri-thumbnailer/default.nix b/pkgs/desktops/lomiri/services/lomiri-thumbnailer/default.nix
index a19023f42b5d..6599d1db594e 100644
--- a/pkgs/desktops/lomiri/services/lomiri-thumbnailer/default.nix
+++ b/pkgs/desktops/lomiri/services/lomiri-thumbnailer/default.nix
@@ -32,6 +32,9 @@
   xvfb-run,
 }:
 
+let
+  withQt6 = lib.strings.versionAtLeast qtbase.version "6";
+in
 stdenv.mkDerivation (finalAttrs: {
   pname = "lomiri-thumbnailer";
   version = "3.1.0";
@@ -141,6 +144,7 @@ stdenv.mkDerivation (finalAttrs: {
   dontWrapQtApps = true;
 
   cmakeFlags = [
+    (lib.cmakeBool "ENABLE_QT6" withQt6)
     (lib.cmakeBool "GSETTINGS_LOCALINSTALL" true)
     (lib.cmakeBool "GSETTINGS_COMPILE" true)
     # error: use of old-style cast to 'std::remove_reference<_GstElement*>::type' {aka 'struct _GstElement*'}
@@ -176,6 +180,12 @@ stdenv.mkDerivation (finalAttrs: {
 
   passthru = {
     tests = {
+      pkg-config = testers.hasPkgConfigModules {
+        package = finalAttrs.finalPackage;
+        versionCheck = true;
+      };
+    }
+    // lib.optionalAttrs (!withQt6) {
       # gallery app delegates to thumbnailer, tests various formats
       inherit (nixosTests.lomiri-gallery-app)
         format-mp4
@@ -187,11 +197,6 @@ stdenv.mkDerivation (finalAttrs: {
 
       # music app relies on thumbnailer to extract embedded cover art
       music-app = nixosTests.lomiri-music-app;
-
-      pkg-config = testers.hasPkgConfigModules {
-        package = finalAttrs.finalPackage;
-        versionCheck = true;
-      };
     };
     updateScript = gitUpdater { };
   };
@@ -208,7 +213,7 @@ stdenv.mkDerivation (finalAttrs: {
     teams = [ lib.teams.lomiri ];
     platforms = lib.platforms.linux;
     pkgConfigModules = [
-      "liblomiri-thumbnailer-qt"
+      "liblomiri-thumbnailer-qt${lib.optionalString withQt6 "6"}"
     ];
   };
 })