Which is why [for example] if you need python cffi on the host build, it's easier to just add it via:
```
+PKG_BUILD_PARALLEL:=0
HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:="cffi==$(PKG_VERSION)"
```
[cffi is one of those packages that needs a host-side package installed].
This works reasonably well in the current OpenWrt build system, as binaries get built for this package and get installed in the staging-dir `$(STAGING_DIR)/usr/lib/pythonX.Y/site-packages`.
+
+`PKG_BUILD_PARALLEL:=0` is necessary because installing packages with multiple concurrent pip processes can lead to [errors or unexpected results](https://github.com/pypa/pip/issues/2361).
PKG_NAME:=bcrypt
PKG_VERSION:=3.1.7
-PKG_RELEASE:=2
+PKG_RELEASE:=3
PYPI_NAME:=$(PKG_NAME)
PKG_HASH:=0b0069c752ec14172c5f78208f1863d7ad6755a6fae6fe76ec2c80d13be41e42
PKG_LICENSE_FILES:=LICENSE
PKG_BUILD_DEPENDS:=libffi/host
+PKG_BUILD_PARALLEL:=0
HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:="cffi>=1.1"
include ../pypi.mk
PKG_NAME:=numpy
PKG_VERSION:=1.18.5
-PKG_RELEASE:=1
+PKG_RELEASE:=2
PYPI_NAME:=$(PKG_NAME)
PKG_HASH:=34e96e9dae65c4839bd80012023aadd6ee2ccb73ce7fdf3074c62f301e63120b
# yes, zip... sigh
PYPI_SOURCE_EXT:=zip
-HOST_PYTHON3_PACKAGE_BUILD_DEPENDS="Cython==0.29.19"
+PKG_BUILD_PARALLEL:=0
+HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:="Cython==0.29.19"
include ../pypi.mk
include $(INCLUDE_DIR)/package.mk
PKG_NAME:=python-cryptography
PKG_VERSION:=2.9.2
-PKG_RELEASE:=1
+PKG_RELEASE:=2
PYPI_NAME:=cryptography
PKG_HASH:=a0c30272fb4ddda5f5ffc1089d7405b7a71b0b0f51993cb4e5dbb4590b2fc229
PKG_MAINTAINER:=Jeffery To <jeffery.to@gmail.com>, Alexandru Ardelean <ardeleanalex@gmail.com>
PKG_BUILD_DEPENDS:=libffi/host
+PKG_BUILD_PARALLEL:=0
HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:="cffi>=1.8,!=1.11.3"
PKG_NAME:=python-jsonschema
PKG_VERSION:=3.2.0
-PKG_RELEASE:=3
+PKG_RELEASE:=4
PYPI_NAME:=jsonschema
PKG_HASH:=c8a85b28d377cc7737e46e2d9f2b4f44ee3c0e1deac6bf46ddefc7187d30797a
PKG_LICENSE:=MIT
PKG_LICENSE_FILES:=COPYING
-HOST_PYTHON3_PACKAGE_BUILD_DEPENDS=setuptools_scm
+PKG_BUILD_PARALLEL:=0
+HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:=setuptools_scm
include ../pypi.mk
include $(INCLUDE_DIR)/package.mk
PKG_NAME:=python-pluggy
PKG_VERSION:=0.13.1
-PKG_RELEASE:=2
+PKG_RELEASE:=3
PYPI_NAME:=pluggy
PKG_HASH:=15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0
PKG_LICENSE:=MIT
PKG_LICENSE_FILES:=LICENSE
+PKG_BUILD_PARALLEL:=0
+HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:=setuptools-scm
+
include ../pypi.mk
include $(INCLUDE_DIR)/package.mk
include ../python3-package.mk
-HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:=setuptools-scm
-
define Package/python3-pluggy
SUBMENU:=Python
SECTION:=lang
PKG_NAME:=python-py
PKG_VERSION:=1.8.1
-PKG_RELEASE:=2
+PKG_RELEASE:=3
PYPI_NAME:=py
PKG_HASH:=5e27081401262157467ad6e7f851b7aa402c5852dbcb3dae06768434de5752aa
PKG_LICENSE:=MIT
PKG_LICENSE_FILES:=LICENSE
+PKG_BUILD_PARALLEL:=0
+HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:=setuptools-scm
+
include ../pypi.mk
include $(INCLUDE_DIR)/package.mk
include ../python3-package.mk
-HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:=setuptools-scm
-
define Package/python3-py
SUBMENU:=Python
SECTION:=lang
PKG_NAME:=python-pycparser
PKG_VERSION:=2.20
-PKG_RELEASE:=2
+PKG_RELEASE:=3
PYPI_NAME:=pycparser
PKG_HASH:=2d475327684562c3a96cc71adf7dc8c4f0565175cf86b6d7a404ff4c771f15f0
PKG_LICENSE_FILES:=LICENSE
PKG_MAINTAINER:=Jeffery To <jeffery.to@gmail.com>
+PKG_BUILD_PARALLEL:=0
HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:="ply==3.10"
include ../pypi.mk
PKG_NAME:=python-pynacl
PKG_VERSION:=1.4.0
-PKG_RELEASE:=2
+PKG_RELEASE:=3
PYPI_NAME:=PyNaCl
PKG_HASH:=54e9a2c849c742006516ad56a88f5c74bf2ce92c9f67435187c3c5953b346505
PKG_LICENSE_FILES:=LICENSE
PKG_BUILD_DEPENDS:=libffi/host
+PKG_BUILD_PARALLEL:=0
HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:="cffi>=1.4.1"
PKG_NAME:=python-pytest
PKG_VERSION:=5.4.2
-PKG_RELEASE:=1
+PKG_RELEASE:=2
PYPI_NAME:=pytest
PKG_HASH:=eb2b5e935f6a019317e455b6da83dd8650ac9ffd2ee73a7b657a30873d67a698
PKG_LICENSE:=MIT
PKG_LICENSE_FILES:=LICENSE
+PKG_BUILD_PARALLEL:=0
HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:=setuptools-scm
include ../pypi.mk
PKG_NAME:=python-zipp
PKG_VERSION:=3.1.0
-PKG_RELEASE:=2
+PKG_RELEASE:=3
PYPI_NAME:=zipp
PKG_HASH:=c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96
PKG_LICENSE:=MIT
PKG_LICENSE_FILES:=LICENSE
+PKG_BUILD_PARALLEL:=0
+HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:="setuptools_scm[toml] >= 3.4.1"
+
include ../pypi.mk
include $(INCLUDE_DIR)/package.mk
include ../python3-package.mk
DEPENDS:=+python3-light
endef
-HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:="setuptools_scm[toml] >= 3.4.1"
-
define Package/python3-zipp/description
Backport of pathlib-compatible object wrapper for zip files
endef
PKG_NAME:=seafile-seahub
PKG_VERSION:=7.1.4
-PKG_RELEASE:=1
+PKG_RELEASE:=2
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
PKG_SOURCE_URL:=https://codeload.github.com/haiwen/seahub/tar.gz/v$(PKG_VERSION)-server?
HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:="Django~=1.11"
-PKG_BUILD_PARALLEL:=1
+PKG_BUILD_PARALLEL:=0
PYTHON3_PKG_BUILD:=0
include $(INCLUDE_DIR)/package.mk