diff --git a/debian/rules b/debian/rules
index 777add5f0..0ee2128d7 100755
--- a/debian/rules
+++ b/debian/rules
@@ -8,7 +8,7 @@ export DH_VERBOSE=1
 export DEB_BUILD_MAINT_OPTIONS=optimize=-lto
 
 %:
-	dh $@ --buildsystem=cmake
+	dh $@ --buildsystem=cmake --builddirectory=build
 
 # Setting the build system is still required, because otherwise the GNUmakefile gets picked up
 override_dh_auto_configure:
@@ -22,4 +22,4 @@ override_dh_clean:
 	-unlink vendor
 
 override_dh_auto_test:
-	make fish_run_tests
+	cd build && make fish_run_tests