diff --git a/lang/python/python3-host.mk b/lang/python/python3-host.mk
index a2f4d6997..e8a375d13 100644
--- a/lang/python/python3-host.mk
+++ b/lang/python/python3-host.mk
@@ -22,23 +22,7 @@ HOST_PYTHON3_BIN:=$(HOST_PYTHON3_DIR)/bin/python$(PYTHON3_VERSION)
 
 HOST_PYTHON3PATH:=$(HOST_PYTHON3_LIB_DIR):$(HOST_PYTHON3_PKG_DIR)
 
-define HostPython3
-	if [ "$(strip $(3))" == "HOST" ]; then \
-		export PYTHONPATH="$(HOST_PYTHON3PATH)"; \
-		export PYTHONDONTWRITEBYTECODE=0; \
-	else \
-		export PYTHONPATH="$(PYTHON3PATH)"; \
-		export PYTHONDONTWRITEBYTECODE=1; \
-		export _python_sysroot="$(STAGING_DIR)"; \
-		export _python_prefix="/usr"; \
-		export _python_exec_prefix="/usr"; \
-	fi; \
-	export PYTHONOPTIMIZE=""; \
-	$(1) \
-	$(HOST_PYTHON3_BIN) $(2);
-endef
-
-define host_python3_settings
+HOST_PYTHON3_VARS = \
 	ARCH="$(HOST_ARCH)" \
 	CC="$(HOSTCC)" \
 	CCSHARED="$(HOSTCC) $(HOST_FPIC)" \
@@ -48,22 +32,19 @@ define host_python3_settings
 	CFLAGS="$(HOST_CFLAGS)" \
 	CPPFLAGS="$(HOST_CPPFLAGS) -I$(HOST_PYTHON3_INC_DIR)" \
 	LDFLAGS="$(HOST_LDFLAGS) -lpython$(PYTHON3_VERSION) -Wl$(comma)-rpath=$(STAGING_DIR_HOSTPKG)/lib" \
-	_PYTHON_HOST_PLATFORM=linux2
-endef
+	_PYTHON_HOST_PLATFORM=linux2 \
+	PYTHONPATH="$(HOST_PYTHON3PATH)" \
+	PYTHONDONTWRITEBYTECODE=0 \
+	PYTHONOPTIMIZE=""
 
-# $(1) => commands to execute before running pythons script
+# $(1) => directory of python script
 # $(2) => python script and its arguments
 # $(3) => additional variables
 define Build/Compile/HostPy3RunHost
-	$(call HostPython3, \
-		$(if $(1),$(1);) \
-		$(call host_python3_settings) \
-		$(3) \
-		, \
-		$(2) \
-		, \
-		HOST \
-	)
+	cd "$(if $(strip $(1)),$(strip $(1)),.)" && \
+	$(HOST_PYTHON3_VARS) \
+	$(3) \
+	$(HOST_PYTHON3_BIN) $(2)
 endef
 
 # Note: I shamelessly copied this from Yousong's logic (from python-packages);
@@ -71,7 +52,7 @@ HOST_PYTHON3_PIP:=$(STAGING_DIR_HOSTPKG)/bin/pip$(PYTHON3_VERSION)
 
 # $(1) => packages to install
 define Build/Compile/HostPy3PipInstall
-	$(call host_python3_settings) \
+	$(HOST_PYTHON3_VARS) \
 	$(HOST_PYTHON3_PIP) \
 		--disable-pip-version-check \
 		--cache-dir "$(DL_DIR)/pip-cache" \
@@ -84,7 +65,7 @@ endef
 # $(3) => additional variables
 define Build/Compile/HostPy3Mod
 	$(call Build/Compile/HostPy3RunHost, \
-		cd $(HOST_BUILD_DIR)/$(strip $(1)), \
-		./setup.py $(2), \
+		$(HOST_BUILD_DIR)/$(strip $(1)), \
+		setup.py $(2), \
 		$(3))
 endef
diff --git a/lang/python/python3-package.mk b/lang/python/python3-package.mk
index 97589b563..0571bb271 100644
--- a/lang/python/python3-package.mk
+++ b/lang/python/python3-package.mk
@@ -96,26 +96,32 @@ define Py3Package
   endif # Package/$(1)/install
 endef
 
-# $(1) => commands to execute before running pythons script
+PYTHON3_VARS = \
+	CC="$(TARGET_CC)" \
+	CCSHARED="$(TARGET_CC) $(FPIC)" \
+	CXX="$(TARGET_CXX)" \
+	LD="$(TARGET_CC)" \
+	LDSHARED="$(TARGET_CC) -shared" \
+	CFLAGS="$(TARGET_CFLAGS)" \
+	CPPFLAGS="$(TARGET_CPPFLAGS) -I$(PYTHON3_INC_DIR)" \
+	LDFLAGS="$(TARGET_LDFLAGS) -lpython$(PYTHON3_VERSION)" \
+	_PYTHON_HOST_PLATFORM=linux2 \
+	__PYVENV_LAUNCHER__="/usr/bin/$(PYTHON3)" \
+	PYTHONPATH="$(PYTHON3PATH)" \
+	PYTHONDONTWRITEBYTECODE=1 \
+	PYTHONOPTIMIZE="" \
+	_python_sysroot="$(STAGING_DIR)" \
+	_python_prefix="/usr" \
+	_python_exec_prefix="/usr"
+
+# $(1) => directory of python script
 # $(2) => python script and its arguments
 # $(3) => additional variables
 define Build/Compile/HostPy3RunTarget
-	$(call HostPython3, \
-		$(if $(1),$(1);) \
-		CC="$(TARGET_CC)" \
-		CCSHARED="$(TARGET_CC) $(FPIC)" \
-		CXX="$(TARGET_CXX)" \
-		LD="$(TARGET_CC)" \
-		LDSHARED="$(TARGET_CC) -shared" \
-		CFLAGS="$(TARGET_CFLAGS)" \
-		CPPFLAGS="$(TARGET_CPPFLAGS) -I$(PYTHON3_INC_DIR)" \
-		LDFLAGS="$(TARGET_LDFLAGS) -lpython$(PYTHON3_VERSION)" \
-		_PYTHON_HOST_PLATFORM=linux2 \
-		__PYVENV_LAUNCHER__="/usr/bin/$(PYTHON3)" \
-		$(3) \
-		, \
-		$(2) \
-	)
+	cd "$(if $(strip $(1)),$(strip $(1)),.)" && \
+	$(PYTHON3_VARS) \
+	$(3) \
+	$(HOST_PYTHON3_BIN) $(2)
 endef
 
 # $(1) => build subdir
@@ -124,8 +130,8 @@ endef
 define Build/Compile/Py3Mod
 	$(INSTALL_DIR) $(PKG_INSTALL_DIR)/$(PYTHON3_PKG_DIR)
 	$(call Build/Compile/HostPy3RunTarget, \
-		cd $(PKG_BUILD_DIR)/$(strip $(1)), \
-		./setup.py $(2), \
+		$(PKG_BUILD_DIR)/$(strip $(1)), \
+		setup.py $(2), \
 		$(3))
 endef
 
diff --git a/net/uwsgi/Makefile b/net/uwsgi/Makefile
index f2b6633b7..9b95027d7 100644
--- a/net/uwsgi/Makefile
+++ b/net/uwsgi/Makefile
@@ -109,7 +109,7 @@ define Build/Compile
 	$(call Build/Compile/Default,plugin.syslog PROFILE=openwrt)
 	$(call Build/Compile/Default,plugin.cgi PROFILE=openwrt)
 	$(call Build/Compile/HostPy3RunTarget, \
-		cd $(PKG_BUILD_DIR), \
+		$(PKG_BUILD_DIR), \
 		uwsgiconfig.py --plugin plugins/python openwrt, \
 		CPP="$(TARGET_CROSS)cpp" \
 		LINUX_UNAME_VERSION=$(LINUX_UNAME_VERSION) \