diff --git a/.gitignore b/.gitignore
index b5523f685..5887b37a3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -53,6 +53,7 @@ result
 # Flatpak
 .flatpak-builder
 flatbuild
+org.prismlauncher.PrismLauncher.flatpak
 
 # Snap
 *.snap
diff --git a/flatpak/build-flatpak.sh b/flatpak/build-flatpak.sh
new file mode 100755
index 000000000..bde61595c
--- /dev/null
+++ b/flatpak/build-flatpak.sh
@@ -0,0 +1,144 @@
+#!/usr/bin/env bash
+
+set -e
+
+SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)"
+cd "${SCRIPT_DIR}"
+
+function can_exec {
+  if [[ -z "$1" ]]; then
+    echo "Error: can_exec requires 1 argument."
+    return 1
+  fi
+
+  if local full_path="$(command -v "$1" 2>/dev/null)"; then
+    if [[ ! -z "${full_path}" ]] && [[ -x "${full_path}" ]]; then
+      return 0
+    fi
+  fi
+
+  return 1
+}
+
+function show_help {
+  echo "Flatpak Builder for Prism Launcher."
+  echo
+  echo "Syntax: build-flatpak.sh [options...]"
+  echo
+  echo "Options:"
+  echo "-i     Install the application after building."
+  echo "-e     Export to a distributable \".flatpak\" bundle."
+  echo "-r     Run the application after installation (requires -i)."
+  echo "-u     Use the current user's Flatpak environment instead of System."
+  echo "-h     Show the help."
+  echo
+}
+
+_OPT_FLATPAK_USER="false"
+_OPT_INSTALL="false"
+_OPT_EXPORT="false"
+_OPT_RUN="false"
+
+while getopts ":huier" option; do
+  case $option in
+  h)
+    show_help
+    exit
+    ;;
+  u)
+    _OPT_FLATPAK_USER="true"
+    ;;
+  i)
+    _OPT_INSTALL="true"
+    ;;
+  e)
+    _OPT_EXPORT="true"
+    ;;
+  r)
+    _OPT_RUN="true"
+    ;;
+  \?)
+    echo "Error: Invalid option. Use -h to show the usage instructions."
+    exit 1
+    ;;
+  esac
+done
+
+if [[ "${_OPT_RUN}" == "true" ]] && [[ "${_OPT_INSTALL}" != "true" ]]; then
+  echo "Error: The -r option also requires the -i option. Use -h to show the usage instructions."
+  exit 1
+fi
+
+BUILD_FLATPAK_ENVIRONMENT="system"
+BUILD_SUDO_CMD=("sudo")
+if [[ "${_OPT_FLATPAK_USER}" == "true" ]]; then
+  BUILD_FLATPAK_ENVIRONMENT="user"
+  BUILD_SUDO_CMD=()
+fi
+
+echo "Flatpak Build Options:"
+echo "- Flatpak Environment: ${BUILD_FLATPAK_ENVIRONMENT}"
+echo "- Install: ${_OPT_INSTALL}"
+echo "- Export: ${_OPT_EXPORT}"
+echo "- Run: ${_OPT_RUN}"
+echo
+
+BUILD_APP_ID="org.prismlauncher.PrismLauncher"
+BUILD_MANIFEST="${BUILD_APP_ID}.yml"
+BUILD_DIR="flatbuild/build"
+BUILD_OSTREE_REPO_DIR="flatbuild/repo"
+
+BUILD_CMD=("flatpak-builder")
+if ! can_exec "${BUILD_CMD[0]}"; then
+  BUILD_CMD=("flatpak" "run" "org.flatpak.Builder")
+fi
+
+declare -a BUILD_EXTRA_ARGS=()
+#BUILD_EXTRA_ARGS+=("--example-dynamically-appended-arg")
+
+set -x
+
+# Build the binaries, but don't create OSTree repo unless we need it (that's slow).
+"${BUILD_CMD[@]}" --verbose \
+  "--${BUILD_FLATPAK_ENVIRONMENT}" \
+  --install-deps-from=flathub \
+  --force-clean --ccache \
+  "${BUILD_EXTRA_ARGS[@]}" \
+  "${BUILD_DIR}" \
+  "${BUILD_MANIFEST}"
+
+# Export to a local OSTree repository directory, but only if necessary.
+if [[ "${_OPT_INSTALL}" == "true" ]] || [[ "${_OPT_EXPORT}" == "true" ]]; then
+  flatpak build-export --verbose \
+    "${BUILD_OSTREE_REPO_DIR}" \
+    "${BUILD_DIR}"
+fi
+
+# Install from the local repository directory.
+# NOTE: Flatpak ONLY treats repos beginning with "/" or "./" as local.
+# NOTE: System installations REQUIRE sudo when using a temporary (local) remote,
+# which protects Flatpak against randomly adding hostile packages to System.
+if [[ "${_OPT_INSTALL}" == "true" ]]; then
+  "${BUILD_SUDO_CMD[@]}" flatpak install --verbose \
+    "--${BUILD_FLATPAK_ENVIRONMENT}" \
+    -y --noninteractive --reinstall \
+    "./${BUILD_OSTREE_REPO_DIR}" \
+    "${BUILD_APP_ID}"
+fi
+
+# Export to distributable ".flatpak" bundle (this takes a very long time).
+if [[ "${_OPT_EXPORT}" == "true" ]]; then
+  echo "Exporting \".flatpak\" bundle. Please be patient, this takes a long time..."
+  flatpak build-bundle --verbose \
+    --runtime-repo=https://flathub.org/repo/flathub.flatpakrepo \
+    "${BUILD_OSTREE_REPO_DIR}" \
+    "${BUILD_APP_ID}.flatpak" \
+    "${BUILD_APP_ID}"
+fi
+
+echo "Build complete."
+
+# Run the locally installed application.
+if [[ "${_OPT_RUN}" == "true" ]]; then
+  flatpak run "--${BUILD_FLATPAK_ENVIRONMENT}" "${BUILD_APP_ID}"
+fi