diff --git a/debian/rules b/debian/rules
index e4a172e..bd1d0bf 100755
--- a/debian/rules
+++ b/debian/rules
@@ -64,7 +64,7 @@ export PIKA_BUILD_ARCH = $(shell cat ../pika-build-arch)
 
 ## overriding dh_auto_configure to add custom configs:
 override_dh_auto_configure:
-	cmake --no-warn-unused-cli -DCMAKE_BUILD_TYPE:STRING=Release -S . -B ./build
+	cmake --no-warn-unused-cli -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE:STRING=Release -S . -B ./build
 	cmake --build ./build --config Release --target hyprlock -j32
 
 override_dh_install: