diff --git a/build-aux/flatpak/org.gtk.Demo4.json b/build-aux/flatpak/org.gtk.Demo4.json
index c3f69c7a48..2e5359ed2a 100644
--- a/build-aux/flatpak/org.gtk.Demo4.json
+++ b/build-aux/flatpak/org.gtk.Demo4.json
@@ -186,7 +186,7 @@
             "builddir" : true,
             "config-opts" : [
                 "--libdir=/app/lib",
-                "-Denable_vulkan=no",
+                "-Dvulkan=disabled",
                 "-Dbuildtype=debugoptimized",
                 "-Dprofile=devel"
             ],
diff --git a/build-aux/flatpak/org.gtk.IconBrowser4.json b/build-aux/flatpak/org.gtk.IconBrowser4.json
index 000374911a..fe11db5596 100644
--- a/build-aux/flatpak/org.gtk.IconBrowser4.json
+++ b/build-aux/flatpak/org.gtk.IconBrowser4.json
@@ -115,7 +115,7 @@
             "builddir" : true,
             "config-opts" : [
                 "--libdir=/app/lib",
-                "-Denable_vulkan=no",
+                "-Dvulkan=disabled",
                 "-Dbuildtype=debugoptimized",
                 "-Dprofile=devel"
             ],
diff --git a/build-aux/flatpak/org.gtk.WidgetFactory4.json b/build-aux/flatpak/org.gtk.WidgetFactory4.json
index 1d51d1b7c2..b62825effa 100644
--- a/build-aux/flatpak/org.gtk.WidgetFactory4.json
+++ b/build-aux/flatpak/org.gtk.WidgetFactory4.json
@@ -115,7 +115,7 @@
             "builddir" : true,
             "config-opts" : [
                 "--libdir=/app/lib",
-                "-Denable_vulkan=no",
+                "-Dvulkan=disabled",
                 "-Dbuildtype=debugoptimized",
                 "-Dprofile=devel"
             ],