diff --git a/Makefile b/Makefile
index 9b3fb61..e4669d0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,35 +1,36 @@
 REPO=repo
 ARCH?=$(shell flatpak --default-arch)
+INSTALL_SOURCE?=--install-deps-from=flathub
 
 all: $(REPO)/config $(foreach file, $(wildcard org.*.*.json), $(subst .json,.app,$(file))) $(foreach file, $(wildcard org.*.*.remoteapp), $(subst .remoteapp,.app,$(file)))
 
 %.app: %.json
-	flatpak-builder --force-clean --arch=$(ARCH) --ccache --repo=$(REPO) --subject="Build of $<, `date`" ${EXPORT_ARGS} app $<
+	flatpak-builder $(INSTALL_SOURCE) --force-clean --arch=$(ARCH) --ccache --repo=$(REPO) --subject="Build of $<, `date`" ${EXPORT_ARGS} app $<
 
 %.app: %.remoteapp
 	./build.sh $<
 
 %.flatpak: %.app
 	flatpak build-bundle ${REPO} $@ $*
 
 export:
 	flatpak build-update-repo --prune --prune-depth=20 $(REPO) ${EXPORT_ARGS}
 
 $(REPO)/config:
 	ostree init --mode=archive-z2 --repo=$(REPO)
 
 remotes:
 	flatpak remote-add kde --from https://distribute.kde.org/kderuntime.flatpakrepo --if-not-exists
 
 deps:
 	flatpak install $(ARGS) kde org.kde.Platform
 	flatpak install $(ARGS) kde org.kde.Sdk
 
 check: $(REPO)/config $(foreach file, $(wildcard org.*.*.json), $(subst .json,.clean,$(file)))
 
 %.clean: %.json
 	json-glib-validate $<
 	flatpak-builder --force-clean --arch=$(ARCH) --download-only ${EXPORT_ARGS} app $<
 
 clean:
 	rm -rf $(TMP) .flatpak-builder