diff --git a/third_party/python/python.mk b/third_party/python/python.mk
index ab43324db..6bd8b8b77 100644
--- a/third_party/python/python.mk
+++ b/third_party/python/python.mk
@@ -35,10 +35,12 @@ THIRD_PARTY_PYTHON_CHECKS =						\
 # TODO: Deal with aarch64 under qemu not making execve() easy.
 ifneq ($(MODE), dbg)
 ifeq ($(ARCH), x86_64)
+ifneq ($(UNAME_S), Windows)
 THIRD_PARTY_PYTHON_CHECKS +=						\
 	$(THIRD_PARTY_PYTHON_PYTEST_PYMAINS:%=o/$(MODE)/%.runs)
 endif
 endif
+endif
 
 ################################################################################
 # STAGE ONE - BOOTSTRAPPING PYTHON
diff --git a/third_party/tree/tree.mk b/third_party/tree/tree.mk
index b41f53997..e8b8cde1f 100644
--- a/third_party/tree/tree.mk
+++ b/third_party/tree/tree.mk
@@ -42,7 +42,7 @@ $(THIRD_PARTY_TREE_A).pkg:				\
 
 o/$(MODE)/third_party/tree/tree.com.dbg:		\
 		$(THIRD_PARTY_TREE)			\
-		o/$(MODE)/third_party/tree/cmd.o	\
+		o/$(MODE)/third_party/tree/tree.o	\
 		$(CRT)					\
 		$(APE_NO_MODIFY_SELF)
 	@$(APELINK)