diff --git a/debian/rules b/debian/rules
index 3818cc3..95a5fdf 100755
--- a/debian/rules
+++ b/debian/rules
@@ -1,6 +1,6 @@
 #!/usr/bin/make -f
 
-export PIKA_BUILD_ARCH = $(shell cat pika-build-arch)
+export PIKA_BUILD_ARCH = $(shell cat ../pika-build-arch)
 
 %:
 	dh $@