Build: Use pipenv sync --system instead of requirements.txt

When pipenv dumps the lock file to a requirements.txt, it does not
include the `sys_platform` directive. This causes pip to attempt to
install win32 packages, which fails. By using `pypenv sync --system`
instead, only packages applicable to Linux are installed.

Fixes #1993

build_scripts/appimage/appimage.sh

@@ -79,20 +79,10 @@ install_monkey_island_python_dependencies() {
  log_message "Installing pipenv"
  "$APPDIR"/AppRun -m pip install pipenv || handle_error
 
- requirements_island="$BUILD_DIR/monkey_island/requirements.txt"
- generate_requirements_from_pipenv_lock "$requirements_island"
-
- log_message "Installing island python requirements"
- "$APPDIR"/AppRun -m pip install -r "${requirements_island}" --ignore-installed || handle_error
-}
-
-generate_requirements_from_pipenv_lock () {
- local requirements_island=$1
-
- log_message "Generating a requirements.txt file with 'pipenv requirements'"
- pushd "$BUILD_DIR/monkey_island"
- "$APPDIR"/AppRun -m pipenv --python "$APPDIR/AppRun" requirements --hash > "$requirements_island" || handle_error
- popd
+ log_message "Installing dependencies"
+ pushd "$BUILD_DIR/monkey_island" || handle_error
+ "$APPDIR"/AppRun -m pipenv --python "$APPDIR/AppRun" sync --system || handle_error
+ popd || handle_error
 }