diff --git a/INSTALL.md b/INSTALL.md
index 8910fb2d..46fd66a3 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -113,7 +113,7 @@ Once you have `flatpak` and `flatpak-builder` installed:
 git clone git://github.com/Bitmessage/PyBitmessage.git
 cd PyBitmessage/
 git submodule add https://github.com/flathub/shared-modules.git
-flatpak-builder --install -install-deps-from=flathub --force-clean --user build/_flatpak org.bitmessage.PyBitmessage.json
+flatpak-builder --install --user -install-deps-from=flathub --force-clean --state-dir=build/.flatpak-builder build/_flatpak org.bitmessage.PyBitmessage.json
 ```
 This will install PyBitmessage to your local flatpak user repository, but it 
 takes a while to compile because QT4 and PyQt4 have to be build, among others.