diff --git a/biology/py-python-libsbml/Makefile b/biology/py-python-libsbml/Makefile
index 11c225fd511b..d54f69ade095 100644
--- a/biology/py-python-libsbml/Makefile
+++ b/biology/py-python-libsbml/Makefile
@@ -1,23 +1,24 @@
 PORTNAME=	python-libsbml
 DISTVERSION=	5.20.1
 CATEGORIES=	biology python
 #MASTER_SITES=	PYPI # no tarballs on PYPI
 MASTER_SITES=	https://github.com/sbmlteam/python-libsbml/releases/download/v${DISTVERSION}/
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	LibSBML Python API
 WWW=		https://sbml.org/Main_Page
 
 LICENSE=	LGPL21
 
 BUILD_DEPENDS=	cmake:devel/cmake-core \
 		swig:devel/swig
 
 USES=		python:3.8-3.9
 USE_PYTHON=	autoplist distutils # autoplist produces incomplete plist, missing files are in pkg-plist. Reported to the upstream author fbergman@caltech.edu on 2021-08-17
+MAKE_ENV=	FREEBSD_MAKE_JOBS=${_MAKE_JOBS}
 
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/libsbml/_libsbml*.so
 
 .include <bsd.port.mk>
diff --git a/biology/py-python-libsbml/files/patch-setup.py b/biology/py-python-libsbml/files/patch-setup.py
new file mode 100644
index 000000000000..17bdf70eb9ed
--- /dev/null
+++ b/biology/py-python-libsbml/files/patch-setup.py
@@ -0,0 +1,22 @@
+- workaround for https://github.com/sbmlteam/python-libsbml/issues/36
+
+--- setup.py.orig	2023-05-25 10:49:17 UTC
++++ setup.py
+@@ -248,7 +248,7 @@ class CMakeBuild(build_ext):
+                              '-DWITH_LIBXML=OFF',
+                          ]
+                          )
+-              self.spawn(['cmake', '--build', '.', '--target', 'install'] + build_args)
++              self.spawn(['cmake', '--build', '.', '-j', os.getenv('FREEBSD_MAKE_JOBS'), '--target', 'install'] + build_args)
+               os.chdir(cwd)
+             DEP_DIR = dep_inst_dir
+ 
+@@ -297,7 +297,7 @@ class CMakeBuild(build_ext):
+         os.chdir(build_temp)
+         self.spawn(['cmake', SRC_DIR] + cmake_args)
+         if not self.dry_run:
+-            self.spawn(['cmake', '--build', '.', '--target', 'binding_python_lib'] + build_args)
++            self.spawn(['cmake', '--build', '.', '-j', os.getenv('FREEBSD_MAKE_JOBS'), '--target', 'binding_python_lib'] + build_args)
+         
+             # at this point the build should be complete, and we have all the files 
+             # neeed in the temp build_folder