diff --git a/.github/workflows/web_app.yml b/.github/workflows/web_app.yml
new file mode 100644
index 0000000..c57bcea
--- /dev/null
+++ b/.github/workflows/web_app.yml
@@ -0,0 +1,45 @@
+name: Web app
+
+on:
+  pull_request:
+  push:
+
+jobs:
+  build:
+    name: ${{ matrix.platform.os }} / ${{ matrix.platform.arch }} / python-${{ matrix.python_version }}
+    runs-on: ${{ matrix.platform.os }}
+    timeout-minutes: 30
+    defaults:
+      run:
+        shell: bash -l {0}
+    strategy:
+      fail-fast: false
+      matrix:
+        python_version: ["3.12"]
+        platform:
+          - { os: "ubuntu-24.04", arch: x64 }
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python_version }}
+          cache: "pip"
+          cache-dependency-path: "**/requirements*.txt"
+      - name: Install Python packages
+        run: |
+          pip install -r environment/configuration/requirements.txt -r environment/configuration/requirements-dev.txt
+
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          flutter-version: "3.24.5"
+          channel: "stable"
+          cache: true
+      - name: Create web app
+        run: |
+          mkdir build
+          cd build
+          cmake -S .. -G Ninja
+          cmake --build . --target web_app
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6c3004b..8fe5363 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,6 +20,7 @@ enable_testing()
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/environment/cmake)
 
 find_package(CairoSVG REQUIRED)
+find_package(Flet REQUIRED)
 find_package(PyInstaller REQUIRED)
 find_package(Python3 REQUIRED COMPONENTS Interpreter)
 find_package(QtTools)
diff --git a/environment/cmake/FindFlet.cmake b/environment/cmake/FindFlet.cmake
new file mode 100644
index 0000000..ba8d12c
--- /dev/null
+++ b/environment/cmake/FindFlet.cmake
@@ -0,0 +1,13 @@
+find_program(Flet_EXECUTABLE
+    NAMES flet
+)
+
+include(FindPackageHandleStandardArgs)
+
+find_package_handle_standard_args(Flet DEFAULT_MSG
+    Flet_EXECUTABLE
+)
+
+mark_as_advanced(
+    Flet_EXECUTABLE
+)
diff --git a/source/package/pathways_app/CMakeLists.txt b/source/package/pathways_app/CMakeLists.txt
index f5f4a30..88bf2cc 100644
--- a/source/package/pathways_app/CMakeLists.txt
+++ b/source/package/pathways_app/CMakeLists.txt
@@ -1,6 +1,3 @@
-find_program(AP_FLET_COMMAND flet REQUIRED)
-
-
 configure_file(
     pyproject.toml.in
     pyproject.toml
@@ -13,7 +10,7 @@ add_custom_target(web_app
             ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR}
     COMMAND
         ${CMAKE_COMMAND} -E env "PIP_FIND_LINKS=file://${PROJECT_BINARY_DIR}/dist"
-            ${AP_FLET_COMMAND} build web ${CMAKE_CURRENT_BINARY_DIR}
+            ${Flet_EXECUTABLE} build web ${CMAKE_CURRENT_BINARY_DIR}
     COMMAND
         ${CMAKE_COMMAND} -E echo
             "Run a command like this to start the web app:"