diff --git a/Makefile b/Makefile
index bf9ee6856..d47c720e4 100644
--- a/Makefile
+++ b/Makefile
@@ -52,7 +52,7 @@ BUILDFLAGS := --release --strip
 DEVFLAGS := $(BUILDFLAGS)
 RUNFLAGS :=
 CHECKABLE_PY := pylib qt
-CHECKABLE_RS := rslib
+CHECKABLE_RS := rslib rspy
 DEVEL := rslib rspy pylib qt
 
 .PHONY: all
@@ -155,14 +155,8 @@ clean-dist: buildhash
 check: pyenv buildhash prepare
 	@set -eu -o pipefail ${SHELLFLAGS}; \
 	.github/scripts/trailing-newlines.sh; \
-	$(SUBMAKE) -C rslib develop; \
-	for dir in $(CHECKABLE_RS); do \
-		$(SUBMAKE) -C $$dir check; \
-	done; \
 	. "${ACTIVATE_SCRIPT}"; \
-	$(SUBMAKE) -C rspy develop; \
-	$(SUBMAKE) -C pylib develop; \
-	for dir in $(CHECKABLE_PY); do \
+	for dir in $(CHECKABLE_RS) $(CHECKABLE_PY); do \
 		$(SUBMAKE) -C $$dir check; \
 	done;
 	@echo
diff --git a/rslib/Makefile b/rslib/Makefile
index 4f5eb06aa..3886df07c 100644
--- a/rslib/Makefile
+++ b/rslib/Makefile
@@ -17,7 +17,7 @@ $(shell mkdir -p .build)
 
 all: check
 
-check: ftl/repo .build/check
+check: .build/check
 
 fix:
 	cargo fmt
@@ -41,7 +41,7 @@ RUST_TOOLCHAIN := $(shell cat rust-toolchain)
 	rustup component add clippy-preview --toolchain $(RUST_TOOLCHAIN)
 	@touch $@
 
-.build/check: .build/rs-tools $(ALL_SOURCE)
+.build/check: ftl/repo .build/rs-tools $(ALL_SOURCE)
 	cargo test --lib -- --nocapture
 	cargo fmt -- --check
 	cargo clippy -- -D warnings
diff --git a/rspy/Makefile b/rspy/Makefile
index 0aa87b712..20ee97e28 100644
--- a/rspy/Makefile
+++ b/rspy/Makefile
@@ -90,8 +90,12 @@ RUST_TOOLCHAIN := $(shell cat rust-toolchain)
 	rustup component add clippy-preview --toolchain $(RUST_TOOLCHAIN)
 	@touch $@
 
-.build/check: build
+# cargo clippy also run build.rs, thus it must be called before calling .build/develop
+.build/check: .build/clippy .build/develop
 	cargo fmt -- --check
+	@touch $@
+
+.build/clippy: $(DEPS)
 	cargo clippy -- -D warnings
 	@touch $@