diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index e7e7958..15d782b 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -1,3 +1,5 @@
+name: CI
+
 on:
   push:
     branches:
@@ -6,113 +8,44 @@ on:
     branches:
       - main
 
-env:
-  RUST_VERSION: 1.80.0
-  CARGO_TERM_COLOR: always
-  DEPENDENCIES: libgtk-4-1 libgtk-4-dev libadwaita-1-0 libadwaita-1-dev build-essential
-
 jobs:
-  check:
-    name: Check
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout sources
-        uses: actions/checkout@v2
-
-      - name: Install dependencies
-        run: sudo apt install ${{ env.DEPENDENCIES }}
-
-      - name: Install stable toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: ${{ env.RUST_VERSION }}
-          override: true
-          components: clippy
-
-      - name: Run cargo check
-        uses: actions-rs/cargo@v1
-        with:
-          command: check
-
-      - name: Run cargo clippy
-        uses: actions-rs/cargo@v1
-        with:
-          command: clippy
-          args: --workspace --all-targets --all-features -- -D warnings
-
-  test:
-    name: Test Suite
-    runs-on: ubuntu-latest
+  CI:
+    runs-on: ubuntu-24.04
     steps:
-      - name: Checkout sources
-        uses: actions/checkout@v2
-
-      - name: Install dependencies
-        run: sudo apt install ${{ env.DEPENDENCIES }}
-
-      - name: Install stable toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: ${{ env.RUST_VERSION }}
-          override: true
-
-      - name: Run cargo test
-        uses: actions-rs/cargo@v1
-        with:
-          command: test
-          # --all-targets includes --benches, which we don't want.
-          args: --workspace --all-features --lib --bins --tests --examples --verbose
-
-  rustfmt:
-    name: Format
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout sources
-        uses: actions/checkout@v2
-
-      - name: Install nightly toolchain with rustfmt available
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly
-          override: true
-          components: rustfmt
-
-      - name: Run cargo fmt
-        uses: actions-rs/cargo@v1
-        with:
-          command: fmt
-          args: --all -- --check --verbose
-
-  doc:
-    name: Doc
-    runs-on: ubuntu-latest
-    env:
-      RUSTDOCFLAGS: -D warnings
-    steps:
-      - name: Checkout sources
-        uses: actions/checkout@v2
-
-      - name: Install dependencies
-        run: sudo apt install ${{ env.DEPENDENCIES }}
-
-      - name: Install stable toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: ${{ env.RUST_VERSION }}
-          override: true
-
-      - name: Run cargo doc
-        uses: actions-rs/cargo@v1
-        with:
-          command: doc
-          args: --no-deps --verbose
-
-      - name: Run cargo test --doc
-        uses: actions-rs/cargo@v1
-        with:
-          command: test
-          args: --workspace --all-features --doc --verbose
+      - uses: actions/checkout@v3
+
+      - name: Install host dependencies
+        run: |
+          sudo apt-get install flatpak flatpak-builder just
+
+      # Restore caches
+      - name: Restore Flatpak dependencies
+        uses: actions/cache/restore@v3
+        with:
+          path: ~/.local/share/flatpak
+          key: ${{ runner.os }}-flatpak-dependencies-${{ github.run_id }}
+          restore-keys: |
+            ${{ runner.os }}-flatpak-dependencies-
+      - name: Restore .flatpak-builder
+        uses: actions/cache/restore@v3
+        with:
+          path: .flatpak-builder
+          key: ${{ runner.os }}-flatpak-builder-${{ github.run_id }}
+          restore-keys: |
+            ${{ runner.os }}-flatpak-builder-
+
+      - run: just ci
+
+      # Save caches
+      - name: Save Flatpak dependencies
+        uses: actions/cache/save@v3
+        if: always()
+        with:
+          path: ~/.local/share/flatpak
+          key: ${{ runner.os }}-flatpak-dependencies-${{ github.run_id }}
+      - name: Save .flatpak-builder
+        uses: actions/cache/save@v3
+        if: always()
+        with:
+          path: .flatpak-builder
+          key: ${{ runner.os }}-flatpak-builder-${{ github.run_id }}
diff --git a/.gitignore b/.gitignore
index a334063..493b55f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,5 +13,6 @@ debian/*
 !debian/rules
 !debian/source
 
-.flatpak-builder
-assets/locale
+flatpak/
+.flatpak-builder/
+assets/locale/
diff --git a/build-aux/cargo-sources.json b/build-aux/cargo-sources.json
index a4512b4..20ae03f 100644
--- a/build-aux/cargo-sources.json
+++ b/build-aux/cargo-sources.json
@@ -285,97 +285,6 @@
         "dest": "cargo/vendor/dotext-0.1.1",
         "dest-filename": ".cargo-checksum.json"
     },
-    {
-        "type": "archive",
-        "archive-type": "tar-gzip",
-        "url": "https://static.crates.io/crates/encoding/encoding-0.2.33.crate",
-        "sha256": "6b0d943856b990d12d3b55b359144ff341533e516d94098b1d3fc1ac666d36ec",
-        "dest": "cargo/vendor/encoding-0.2.33"
-    },
-    {
-        "type": "inline",
-        "contents": "{\"package\": \"6b0d943856b990d12d3b55b359144ff341533e516d94098b1d3fc1ac666d36ec\", \"files\": {}}",
-        "dest": "cargo/vendor/encoding-0.2.33",
-        "dest-filename": ".cargo-checksum.json"
-    },
-    {
-        "type": "archive",
-        "archive-type": "tar-gzip",
-        "url": "https://static.crates.io/crates/encoding-index-japanese/encoding-index-japanese-1.20141219.5.crate",
-        "sha256": "04e8b2ff42e9a05335dbf8b5c6f7567e5591d0d916ccef4e0b1710d32a0d0c91",
-        "dest": "cargo/vendor/encoding-index-japanese-1.20141219.5"
-    },
-    {
-        "type": "inline",
-        "contents": "{\"package\": \"04e8b2ff42e9a05335dbf8b5c6f7567e5591d0d916ccef4e0b1710d32a0d0c91\", \"files\": {}}",
-        "dest": "cargo/vendor/encoding-index-japanese-1.20141219.5",
-        "dest-filename": ".cargo-checksum.json"
-    },
-    {
-        "type": "archive",
-        "archive-type": "tar-gzip",
-        "url": "https://static.crates.io/crates/encoding-index-korean/encoding-index-korean-1.20141219.5.crate",
-        "sha256": "4dc33fb8e6bcba213fe2f14275f0963fd16f0a02c878e3095ecfdf5bee529d81",
-        "dest": "cargo/vendor/encoding-index-korean-1.20141219.5"
-    },
-    {
-        "type": "inline",
-        "contents": "{\"package\": \"4dc33fb8e6bcba213fe2f14275f0963fd16f0a02c878e3095ecfdf5bee529d81\", \"files\": {}}",
-        "dest": "cargo/vendor/encoding-index-korean-1.20141219.5",
-        "dest-filename": ".cargo-checksum.json"
-    },
-    {
-        "type": "archive",
-        "archive-type": "tar-gzip",
-        "url": "https://static.crates.io/crates/encoding-index-simpchinese/encoding-index-simpchinese-1.20141219.5.crate",
-        "sha256": "d87a7194909b9118fc707194baa434a4e3b0fb6a5a757c73c3adb07aa25031f7",
-        "dest": "cargo/vendor/encoding-index-simpchinese-1.20141219.5"
-    },
-    {
-        "type": "inline",
-        "contents": "{\"package\": \"d87a7194909b9118fc707194baa434a4e3b0fb6a5a757c73c3adb07aa25031f7\", \"files\": {}}",
-        "dest": "cargo/vendor/encoding-index-simpchinese-1.20141219.5",
-        "dest-filename": ".cargo-checksum.json"
-    },
-    {
-        "type": "archive",
-        "archive-type": "tar-gzip",
-        "url": "https://static.crates.io/crates/encoding-index-singlebyte/encoding-index-singlebyte-1.20141219.5.crate",
-        "sha256": "3351d5acffb224af9ca265f435b859c7c01537c0849754d3db3fdf2bfe2ae84a",
-        "dest": "cargo/vendor/encoding-index-singlebyte-1.20141219.5"
-    },
-    {
-        "type": "inline",
-        "contents": "{\"package\": \"3351d5acffb224af9ca265f435b859c7c01537c0849754d3db3fdf2bfe2ae84a\", \"files\": {}}",
-        "dest": "cargo/vendor/encoding-index-singlebyte-1.20141219.5",
-        "dest-filename": ".cargo-checksum.json"
-    },
-    {
-        "type": "archive",
-        "archive-type": "tar-gzip",
-        "url": "https://static.crates.io/crates/encoding-index-tradchinese/encoding-index-tradchinese-1.20141219.5.crate",
-        "sha256": "fd0e20d5688ce3cab59eb3ef3a2083a5c77bf496cb798dc6fcdb75f323890c18",
-        "dest": "cargo/vendor/encoding-index-tradchinese-1.20141219.5"
-    },
-    {
-        "type": "inline",
-        "contents": "{\"package\": \"fd0e20d5688ce3cab59eb3ef3a2083a5c77bf496cb798dc6fcdb75f323890c18\", \"files\": {}}",
-        "dest": "cargo/vendor/encoding-index-tradchinese-1.20141219.5",
-        "dest-filename": ".cargo-checksum.json"
-    },
-    {
-        "type": "archive",
-        "archive-type": "tar-gzip",
-        "url": "https://static.crates.io/crates/encoding_index_tests/encoding_index_tests-0.1.4.crate",
-        "sha256": "a246d82be1c9d791c5dfde9a2bd045fc3cbba3fa2b11ad558f27d01712f00569",
-        "dest": "cargo/vendor/encoding_index_tests-0.1.4"
-    },
-    {
-        "type": "inline",
-        "contents": "{\"package\": \"a246d82be1c9d791c5dfde9a2bd045fc3cbba3fa2b11ad558f27d01712f00569\", \"files\": {}}",
-        "dest": "cargo/vendor/encoding_index_tests-0.1.4",
-        "dest-filename": ".cargo-checksum.json"
-    },
     {
         "type": "archive",
         "archive-type": "tar-gzip",
@@ -1458,14 +1367,14 @@
     {
         "type": "archive",
         "archive-type": "tar-gzip",
-        "url": "https://static.crates.io/crates/pdf-extract/pdf-extract-0.7.7.crate",
-        "sha256": "3423481005e61b95855d53d7b6c0bcc514b4fbab45d165776d6e42c0a1642b22",
-        "dest": "cargo/vendor/pdf-extract-0.7.7"
+        "url": "https://static.crates.io/crates/pdf-extract/pdf-extract-0.7.9.crate",
+        "sha256": "fcbc6f659da931cc7108b6dd3b2e3703792cc4c3a562c35ab9c3bf38895f107f",
+        "dest": "cargo/vendor/pdf-extract-0.7.9"
     },
     {
         "type": "inline",
-        "contents": "{\"package\": \"3423481005e61b95855d53d7b6c0bcc514b4fbab45d165776d6e42c0a1642b22\", \"files\": {}}",
-        "dest": "cargo/vendor/pdf-extract-0.7.7",
+        "contents": "{\"package\": \"fcbc6f659da931cc7108b6dd3b2e3703792cc4c3a562c35ab9c3bf38895f107f\", \"files\": {}}",
+        "dest": "cargo/vendor/pdf-extract-0.7.9",
         "dest-filename": ".cargo-checksum.json"
     },
     {
diff --git a/gnome/de.leopoldluley.Clapgrep.json b/build-aux/de.leopoldluley.Clapgrep.json
similarity index 97%
rename from gnome/de.leopoldluley.Clapgrep.json
rename to build-aux/de.leopoldluley.Clapgrep.json
index d2f814d..93dc3ac 100644
--- a/gnome/de.leopoldluley.Clapgrep.json
+++ b/build-aux/de.leopoldluley.Clapgrep.json
@@ -60,7 +60,7 @@
           "type": "dir",
           "path": ".."
         },
-        "../build-aux/cargo-sources.json"
+        "./cargo-sources.json"
       ]
     }
   ]
diff --git a/build-aux/fun.sh b/build-aux/fun.sh
new file mode 100755
index 0000000..513c7d3
--- /dev/null
+++ b/build-aux/fun.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env sh
+
+flatpak-builder --run $(dirname $0)/../flatpak $(dirname $0)/de.leopoldluley.Clapgrep.json "$@"
diff --git a/justfile b/justfile
index 447e9a2..326283a 100644
--- a/justfile
+++ b/justfile
@@ -39,6 +39,15 @@ check *args:
 run *args: build-translations
   env RUST_BACKTRACE=full cargo run --package {{frontend}} {{args}}
 
+ci: setup-flatpak-repos
+  flatpak-builder --delete-build-dirs --disable-updates --build-only --ccache --force-clean flatpak build-aux/{{appid}}.json
+  echo Check formatting:
+  ./build-aux/fun.sh cargo fmt --all -- --check --verbose
+  echo Check code:
+  ./build-aux/fun.sh cargo check
+  echo Check code with Clippy:
+  ./build-aux/fun.sh cargo clippy --workspace --all-targets --all-features -- -D warnings
+
 install:
   mkdir -p {{po-dst}}
   install -Dm0755 {{bin-src}} {{bin-dst}}
@@ -57,9 +66,13 @@ make-makefile:
 prepare-flatpak: make-makefile
   python3 build-aux/flatpak-cargo-generator.py ./Cargo.lock -o build-aux/cargo-sources.json
 
-install-flatpak:
+install-flatpak: setup-flatpak-repos
   flatpak-builder flatpak-build gnome/de.leopoldluley.Clapgrep.json --force-clean --install --user
 
+setup-flatpak-repos:
+	flatpak remote-add --user --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
+	flatpak install --or-update --user --noninteractive flathub org.gnome.Sdk//46 org.freedesktop.Sdk.Extension.rust-stable//23.08
+
 gettext *args:
   xgettext \
     --from-code=UTF-8 \