diff --git a/build-aux/flatpak/org.gtk.Demo4.json b/build-aux/flatpak/org.gtk.Demo4.json
index 5c75ece589..51d207d461 100644
--- a/build-aux/flatpak/org.gtk.Demo4.json
+++ b/build-aux/flatpak/org.gtk.Demo4.json
@@ -63,36 +63,6 @@
                 }
             ]
         },
-        {
-            "name" : "libsass",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/libsass.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
-        {
-            "name" : "sassc",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/sassc.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
         {
             "name": "boost",
             "buildsystem": "simple",
@@ -194,6 +164,30 @@
                     "type" : "git",
                     "url" : "https://gitlab.gnome.org/GNOME/gtk.git",
                     "branch" : "main"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/libsass_3.6.4-1/libsass-3.6.4.tar.gz",
+                    "sha256": "f9484d9a6df60576e791566eab2f757a97fd414fce01dd41fc0a693ea5db2889",
+                    "dest": "subprojects/packagecache"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/libsass_3.6.4-1/libsass_3.6.4-1_patch.zip",
+                    "sha256": "c494221e13d5d223fa93f13bded8cac149ed8e231223ea3dfdab1c1871def42f",
+                    "dest": "subprojects/packagecache"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/sassc_3.6.2-1/sassc-3.6.2.tar.gz",
+                    "sha256": "608dc9002b45a91d11ed59e352469ecc05e4f58fc1259fc9a9f5b8f0f8348a03",
+                    "dest": "subprojects/packagecache"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/sassc_3.6.2-1/sassc_3.6.2-1_patch.zip",
+                    "sha256": "3b0616fa7f5a007e206fa322946755b3270ba696a3cbdc65b3f0d204998c076c",
+                    "dest": "subprojects/packagecache"
                 }
             ]
         }
diff --git a/build-aux/flatpak/org.gtk.IconBrowser4.json b/build-aux/flatpak/org.gtk.IconBrowser4.json
index b563dbb285..8f7396acd8 100644
--- a/build-aux/flatpak/org.gtk.IconBrowser4.json
+++ b/build-aux/flatpak/org.gtk.IconBrowser4.json
@@ -63,36 +63,6 @@
                 }
             ]
         },
-        {
-            "name" : "libsass",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/libsass.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
-        {
-            "name" : "sassc",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/sassc.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
         {
             "name" : "pango",
             "buildsystem" : "meson",
@@ -123,6 +93,30 @@
                     "type" : "git",
                     "url" : "https://gitlab.gnome.org/GNOME/gtk.git",
                     "branch" : "main"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/libsass_3.6.4-1/libsass-3.6.4.tar.gz",
+                    "sha256": "f9484d9a6df60576e791566eab2f757a97fd414fce01dd41fc0a693ea5db2889",
+                    "dest": "subprojects/packagecache"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/libsass_3.6.4-1/libsass_3.6.4-1_patch.zip",
+                    "sha256": "c494221e13d5d223fa93f13bded8cac149ed8e231223ea3dfdab1c1871def42f",
+                    "dest": "subprojects/packagecache"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/sassc_3.6.2-1/sassc-3.6.2.tar.gz",
+                    "sha256": "608dc9002b45a91d11ed59e352469ecc05e4f58fc1259fc9a9f5b8f0f8348a03",
+                    "dest": "subprojects/packagecache"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/sassc_3.6.2-1/sassc_3.6.2-1_patch.zip",
+                    "sha256": "3b0616fa7f5a007e206fa322946755b3270ba696a3cbdc65b3f0d204998c076c",
+                    "dest": "subprojects/packagecache"
                 }
             ]
         }
diff --git a/build-aux/flatpak/org.gtk.WidgetFactory4.json b/build-aux/flatpak/org.gtk.WidgetFactory4.json
index 390da50cac..9cd56f0c4c 100644
--- a/build-aux/flatpak/org.gtk.WidgetFactory4.json
+++ b/build-aux/flatpak/org.gtk.WidgetFactory4.json
@@ -63,36 +63,6 @@
                 }
             ]
         },
-        {
-            "name" : "libsass",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/libsass.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
-        {
-            "name" : "sassc",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/sassc.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
         {
             "name" : "pango",
             "buildsystem" : "meson",
@@ -123,6 +93,30 @@
                     "type" : "git",
                     "url" : "https://gitlab.gnome.org/GNOME/gtk.git",
                     "branch" : "main"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/libsass_3.6.4-1/libsass-3.6.4.tar.gz",
+                    "sha256": "f9484d9a6df60576e791566eab2f757a97fd414fce01dd41fc0a693ea5db2889",
+                    "dest": "subprojects/packagecache"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/libsass_3.6.4-1/libsass_3.6.4-1_patch.zip",
+                    "sha256": "c494221e13d5d223fa93f13bded8cac149ed8e231223ea3dfdab1c1871def42f",
+                    "dest": "subprojects/packagecache"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/sassc_3.6.2-1/sassc-3.6.2.tar.gz",
+                    "sha256": "608dc9002b45a91d11ed59e352469ecc05e4f58fc1259fc9a9f5b8f0f8348a03",
+                    "dest": "subprojects/packagecache"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/sassc_3.6.2-1/sassc_3.6.2-1_patch.zip",
+                    "sha256": "3b0616fa7f5a007e206fa322946755b3270ba696a3cbdc65b3f0d204998c076c",
+                    "dest": "subprojects/packagecache"
                 }
             ]
         }
diff --git a/build-aux/flatpak/org.gtk.gtk4.NodeEditor.json b/build-aux/flatpak/org.gtk.gtk4.NodeEditor.json
index ef60c66084..1357fff76e 100644
--- a/build-aux/flatpak/org.gtk.gtk4.NodeEditor.json
+++ b/build-aux/flatpak/org.gtk.gtk4.NodeEditor.json
@@ -63,36 +63,6 @@
                 }
             ]
         },
-        {
-            "name" : "libsass",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/libsass.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
-        {
-            "name" : "sassc",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/sassc.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
         {
             "name" : "pango",
             "buildsystem" : "meson",
@@ -123,6 +93,30 @@
                     "type" : "git",
                     "url" : "https://gitlab.gnome.org/GNOME/gtk.git",
                     "branch" : "main"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/libsass_3.6.4-1/libsass-3.6.4.tar.gz",
+                    "sha256": "f9484d9a6df60576e791566eab2f757a97fd414fce01dd41fc0a693ea5db2889",
+                    "dest": "subprojects/packagecache"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/libsass_3.6.4-1/libsass_3.6.4-1_patch.zip",
+                    "sha256": "c494221e13d5d223fa93f13bded8cac149ed8e231223ea3dfdab1c1871def42f",
+                    "dest": "subprojects/packagecache"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/sassc_3.6.2-1/sassc-3.6.2.tar.gz",
+                    "sha256": "608dc9002b45a91d11ed59e352469ecc05e4f58fc1259fc9a9f5b8f0f8348a03",
+                    "dest": "subprojects/packagecache"
+                },
+                {
+                    "type" : "file",
+                    "url" : "https://github.com/mesonbuild/wrapdb/releases/download/sassc_3.6.2-1/sassc_3.6.2-1_patch.zip",
+                    "sha256": "3b0616fa7f5a007e206fa322946755b3270ba696a3cbdc65b3f0d204998c076c",
+                    "dest": "subprojects/packagecache"
                 }
             ]
         }