diff --git a/.gitlab-ci/build.yml b/.gitlab-ci/build.yml
index 8a44d5e9..ae9f1c95 100644
--- a/.gitlab-ci/build.yml
+++ b/.gitlab-ci/build.yml
@@ -27,13 +27,19 @@ build@aarch64:
 # Test builds with the stable runtime to make sure that the Flatpak will build on Flathub.
 # Should be run manually before tagging a new release.
 .build-stable:
-  image: 'quay.io/gnome_infrastructure/gnome-runtime-images:gnome-46'
+  image: 'quay.io/gnome_infrastructure/gnome-runtime-images:gnome-${GNOME_STABLE_VERSION}'
   variables:
-    MANIFEST_PATH: ".gitlab-ci/org.gnome.Fractal.CiBuildStable.yml"
-    APP_ID: "org.gnome.Fractal.CiBuildStable"
+    GNOME_STABLE_VERSION: "46"
+    LLVM_NIGHTLY_VERSION: "18"
+    LLVM_STABLE_VERSION: "16"
     RUNTIME_REPO: "https://flathub.org/repo/flathub.flatpakrepo"
-    BUNDLE: "${APP_ID}.flatpak"
     RUN_TESTS: 0
+  before_script:
+    # We want to use the latest stable GNOME runtime instead of the nightly runtime.
+    - sed -i "s|master|${GNOME_STABLE_VERSION}|g" ${MANIFEST_PATH}
+    # We want to use the latest LLVM extension for the stable runtime.
+    - sed -i "s|llvm${LLVM_NIGHTLY_VERSION}|llvm${LLVM_STABLE_VERSION}|g" ${MANIFEST_PATH}
+    
 
 build-stable@x86_64:
   extends:
diff --git a/.gitlab-ci/nextest.module.json b/.gitlab-ci/nextest.module.json
new file mode 100644
index 00000000..fdbf3118
--- /dev/null
+++ b/.gitlab-ci/nextest.module.json
@@ -0,0 +1,17 @@
+{
+    "name": "cargo-nextest",
+    "buildsystem": "simple",
+    "sources": [
+        {
+            "type": "archive",
+            "url": "https://github.com/nextest-rs/nextest/releases/download/cargo-nextest-0.9.72/cargo-nextest-0.9.72-x86_64-unknown-linux-gnu.tar.gz",
+            "sha256": "e6f66397d3ba9a150b5debbc414a9ad1f87e4707da1f989c0681444ba5d15571",
+            "dest": "cargo-nextest",
+            "strip-components": 0
+        }
+    ],
+    "build-commands": [
+        "mkdir /app/bin",
+        "mv cargo-nextest/cargo-nextest /app/bin/"
+    ]
+}
\ No newline at end of file
diff --git a/.gitlab-ci/org.gnome.Fractal.CiBuildStable.yml b/.gitlab-ci/org.gnome.Fractal.CiBuildStable.yml
deleted file mode 100644
index 385a7085..00000000
--- a/.gitlab-ci/org.gnome.Fractal.CiBuildStable.yml
+++ /dev/null
@@ -1,53 +0,0 @@
-id: org.gnome.Fractal.CiBuildStable
-runtime: org.gnome.Platform
-runtime-version: '46'
-sdk: org.gnome.Sdk
-sdk-extensions:
-  - org.freedesktop.Sdk.Extension.rust-stable
-  - org.freedesktop.Sdk.Extension.llvm16
-command: fractal
-finish-args:
-  - --socket=fallback-x11
-  - --socket=wayland
-  - --socket=pulseaudio
-  - --share=network
-  - --share=ipc
-  - --device=dri
-build-options:
-  append-ld-library-path: /usr/lib/sdk/llvm16/lib
-  append-path: /usr/lib/sdk/llvm16/bin:/usr/lib/sdk/rust-stable/bin
-  build-args:
-    - --share=network
-  test-args:
-    - --socket=x11
-    - --share=network
-modules:
-  - name: protobuf-c
-    buildsystem: autotools
-    config-opts:
-      - --disable-protoc
-    sources:
-      - type: git
-        url: https://github.com/protobuf-c/protobuf-c.git
-        tag: v1.5.0
-        commit: 8c201f6e47a53feaab773922a743091eb6c8972a
-  - name: libshumate
-    buildsystem: meson
-    config-opts:
-      - -Dgir=false
-      - -Dvapi=false
-      - -Dgtk_doc=false
-      - -Dvector_renderer=true
-    sources:
-      - type: git
-        url: https://gitlab.gnome.org/GNOME/libshumate.git
-        tag: 1.2.2
-        commit: fab290f36bb7043fe6107308ff4f91c80492aa11
-  - name: fractal
-    buildsystem: meson
-    run-tests: true
-    config-opts:
-      - -Dprofile=default
-    sources:
-      - type: dir
-        path: ../
diff --git a/.gitlab-ci/org.gnome.Fractal.CiRust.yml b/.gitlab-ci/org.gnome.Fractal.CiRust.yml
deleted file mode 100644
index 12243634..00000000
--- a/.gitlab-ci/org.gnome.Fractal.CiRust.yml
+++ /dev/null
@@ -1,66 +0,0 @@
-id: org.gnome.Fractal.CiRust
-runtime: org.gnome.Platform
-runtime-version: master
-sdk: org.gnome.Sdk
-sdk-extensions:
-  - org.freedesktop.Sdk.Extension.rust-stable
-  - org.freedesktop.Sdk.Extension.llvm18
-command: fractal
-finish-args:
-  - --socket=fallback-x11
-  - --socket=wayland
-  - --socket=pulseaudio
-  - --share=network
-  - --share=ipc
-  - --device=dri
-build-options:
-  append-ld-library-path: /usr/lib/sdk/llvm18/lib
-  append-path: /usr/lib/sdk/llvm18/bin:/usr/lib/sdk/rust-stable/bin
-  env:
-    CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER: clang
-    CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUSTFLAGS: -C link-arg=-fuse-ld=/usr/lib/sdk/rust-stable/bin/mold --cfg=ruma_identifiers_storage="Arc"
-    CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER: clang
-    CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_RUSTFLAGS: -C link-arg=-fuse-ld=/usr/lib/sdk/rust-stable/bin/mold --cfg=ruma_identifiers_storage="Arc"
-  build-args:
-    - --share=network
-  test-args:
-    - --socket=x11
-    - --share=network
-modules:
-  - name: cargo-nextest
-    buildsystem: simple
-    sources:
-      - type: archive
-        url: https://github.com/nextest-rs/nextest/releases/download/cargo-nextest-0.9.72/cargo-nextest-0.9.72-x86_64-unknown-linux-gnu.tar.gz
-        sha256: e6f66397d3ba9a150b5debbc414a9ad1f87e4707da1f989c0681444ba5d15571
-        dest: cargo-nextest
-        strip-components: 0
-    build-commands:
-      - mkdir /app/bin
-      - mv cargo-nextest/cargo-nextest /app/bin/
-  - name: protobuf-c
-    buildsystem: autotools
-    config-opts:
-      - --disable-protoc
-    sources:
-      - type: git
-        url: https://github.com/protobuf-c/protobuf-c.git
-        tag: v1.5.0
-        commit: 8c201f6e47a53feaab773922a743091eb6c8972a
-  - name: libshumate
-    buildsystem: meson
-    config-opts:
-      - -Dgir=false
-      - -Dvapi=false
-      - -Dgtk_doc=false
-      - -Dvector_renderer=true
-    sources:
-      - type: git
-        url: https://gitlab.gnome.org/GNOME/libshumate.git
-        tag: 1.2.2
-        commit: fab290f36bb7043fe6107308ff4f91c80492aa11
-  - name: fractal
-    buildsystem: meson
-    sources:
-      - type: dir
-        path: ../
diff --git a/.gitlab-ci/test.yml b/.gitlab-ci/test.yml
index a247fc3b..ea011b03 100644
--- a/.gitlab-ci/test.yml
+++ b/.gitlab-ci/test.yml
@@ -24,10 +24,12 @@ rust-tests:
   tags:
     - flatpak
   variables:
-    MANIFEST_PATH: ".gitlab-ci/org.gnome.Fractal.CiRust.yml"
+    TMP_MANIFEST_PATH: "build-aux/org.gnome.Fractal.CiRust.json"
   script:
-    - flatpak-builder --keep-build-dirs --user --disable-rofiles-fuse --stop-at=${FLATPAK_MODULE} flatpak_app --repo=repo ${BRANCH:+--default-branch=$BRANCH} ${MANIFEST_PATH}
-    - echo "cargo-nextest nextest run --config-file ../.gitlab-ci/nextest.toml" | flatpak-builder --disable-rofiles-fuse --build-shell=${FLATPAK_MODULE} flatpak_app ${MANIFEST_PATH}
+    # Add a module for nextest to the Flatpak manifest
+    - jq --slurpfile nextest .gitlab-ci/nextest.module.json '.modules = [$nextest[], .modules[]]' ${MANIFEST_PATH} > ${TMP_MANIFEST_PATH}
+    - flatpak-builder --keep-build-dirs --user --disable-rofiles-fuse --stop-at=${FLATPAK_MODULE} flatpak_app --repo=repo ${BRANCH:+--default-branch=$BRANCH} ${TMP_MANIFEST_PATH}
+    - echo "cargo-nextest nextest run --config-file ../.gitlab-ci/nextest.toml" | flatpak-builder --disable-rofiles-fuse --build-shell=${FLATPAK_MODULE} flatpak_app ${TMP_MANIFEST_PATH}
   dependencies: []
   artifacts:
     reports: