diff --git a/Makefile b/Makefile
index 2947d5584..39fe47ca4 100644
--- a/Makefile
+++ b/Makefile
@@ -257,7 +257,7 @@ $(RAPIDFLUX): target/debug/librapidflux.so
 	cp target/debug/librapidflux.so $@
 
 target/debug/librapidflux.so: $(RAPIDFLUX_SRC)
-	cargo build
+	PYO3_PYTHON=$(DEVEL_VENV)/bin/python cargo build
 
 # --- Setup: Development dependencies ---
 
@@ -319,7 +319,7 @@ check_code: check_poetry common_check check_rapidflux check_unit_test_file_cover
 check_rapidflux:
 	cargo fmt --check
 	cargo clippy --tests -- -D warnings
-	./tools/check_rust_attributes.py $$(find librapidflux -name '*.rs')
+	$(POETRY) run ./tools/check_rust_attributes.py $$(find librapidflux -name '*.rs')
 
 check_poetry: export PYTHONPATH=
 check_poetry: $(RFLX)