diff --git a/kiwixbuild/__init__.py b/kiwixbuild/__init__.py
index 5872732..bb7d6c0 100644
--- a/kiwixbuild/__init__.py
+++ b/kiwixbuild/__init__.py
@@ -38,6 +38,8 @@ def parse_args():
                           help="Clean all intermediate files after the (successfull) build")
     subgroup.add_argument('--dont-install-packages', action='store_true',
                           help="Do not try to install packages before compiling")
+    subgroup.add_argument('--assume-packages-installed', action='store_true',
+                          help="Assume the package to install to be aleady installed")
     subgroup.add_argument('--android-arch', action='append',
                           help=("Specify the architecture to build for android application/libraries.\n"
                                 "Can be specified several times to build for several architectures.\n"
diff --git a/kiwixbuild/builder.py b/kiwixbuild/builder.py
index 1b60056..9df8762 100644
--- a/kiwixbuild/builder.py
+++ b/kiwixbuild/builder.py
@@ -149,6 +149,10 @@ class Builder:
         packages_to_have = self._get_packages()
         packages_to_have = remove_duplicates(packages_to_have)
 
+        if option('assume_packages_installed'):
+            print("SKIP, Assume package installed")
+            return
+
         distname = neutralEnv('distname')
         if distname in ('fedora', 'redhat', 'centos'):
             package_installer = 'sudo dnf install {}'
diff --git a/travis/compile_all.py b/travis/compile_all.py
index 1301ead..f97a25a 100755
--- a/travis/compile_all.py
+++ b/travis/compile_all.py
@@ -75,6 +75,8 @@ def run_kiwix_build(target, platform,
     command = ['kiwix-build']
     command.append(target)
     command.append('--hide-progress')
+    if platform == 'flatpak':
+        command.append('--assume-packages-installed')
     if target == 'kiwix-android' and platform.startswith('android_'):
         command.extend(['--target-platform', 'android', '--android-arch', platform[8:]])
     elif platform == 'android':