diff --git a/_multibuild b/_multibuild
new file mode 100644
index 0000000..0ab1057
--- /dev/null
+++ b/_multibuild
@@ -0,0 +1,4 @@
+<multibuild>
+	<flavor>standard</flavor>
+	<flavor>gtk</flavor>
+</multibuild>
diff --git a/libjxl.spec b/libjxl.spec
index f4c8ee3..36f4506 100644
--- a/libjxl.spec
+++ b/libjxl.spec
@@ -18,7 +18,11 @@
 
 Name:           libjxl
 %define lname   libjxl0_8
-%bcond_without  gtk
+%if "@BUILD_FLAVOR@" == "gtk"
+%bcond_without gtk
+%else
+%bcond_with gtk
+%endif
 Version:        0.8.2
 Release:        0
 Summary:        JPEG XL reference implementation
@@ -79,7 +83,9 @@ Command-line utilities to convert from/to JPEG XL.
 %package -n gdk-pixbuf-loader-jxl
 Summary:        A gdk-pixbuf loader for JPEG-XL using libjxl
 Supplements:    (%lname and gdk-pixbuf)
+%if %{with gtk}
 %gdk_pixbuf_loader_requires
+%endif
 
 %description -n gdk-pixbuf-loader-jxl
 This package provides a libjxl-based gdk-pixbuf loader for JPEG XL files.