diff --git a/misc/py-NATTEN/Makefile b/misc/py-NATTEN/Makefile
index 31e591c4c41d..44625d7910b9 100644
--- a/misc/py-NATTEN/Makefile
+++ b/misc/py-NATTEN/Makefile
@@ -1,44 +1,47 @@
 PORTNAME=	NATTEN
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.21.5
+PORTREVISION=	1
 CATEGORIES=	misc python # machine-learning
 #MASTER_SITES=	PYPI # no tests
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Neighborhood Attention Extension for PyTorch
 WWW=		https://natten.org/ \
 		https://github.com/SHI-Labs/NATTEN
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 # this BUILD_DEPENDS should be used when CUDA would be available
 BUILD_DEPENDS=	${PY_SETUPTOOLS} \
 		cmake:devel/cmake-core \
 		${PYTHON_PKGNAMEPREFIX}pytorch>0:misc/py-pytorch@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}sympy>=1.13.3:math/py-sympy@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}wheel>0:devel/py-wheel@${PY_FLAVOR}
-RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pytorch>=2.0.0:misc/py-pytorch@${PY_FLAVOR}
+RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pytorch>=2.0.0:misc/py-pytorch@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}sympy>=1.13.3:math/py-sympy@${PY_FLAVOR}
 
 USES=		localbase python
 USE_PYTHON=	pep517 autoplist pytest
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	SHI-Labs
 GH_PROJECT=	NATTEN
 
 TEST_ENV=	${MAKE_ENV} PYTHONPATH=${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}
 
 NO_ARCH=	yes # no arch w/out CUDA
 
 post-install:
 	# delete stray files, see https://github.com/SHI-Labs/NATTEN/issues/152
 	@${RM} -r \
 		${STAGEDIR}${PYTHON_SITELIBDIR}/CMakeFiles \
 		${STAGEDIR}${PYTHON_SITELIBDIR}/CMakeCache.txt \
 		${STAGEDIR}${PYTHON_SITELIBDIR}/cmake_install.cmake \
 		${STAGEDIR}${PYTHON_SITELIBDIR}/Makefile
 
 # tests as of 0.21.0: 1 passed, 55 skipped, 1 warning in 14.76s
 
 .include <bsd.port.mk>
diff --git a/misc/py-NATTEN/files/patch-pyproject.toml b/misc/py-NATTEN/files/patch-pyproject.toml
index c13156c191e0..7a9e746686a7 100644
--- a/misc/py-NATTEN/files/patch-pyproject.toml
+++ b/misc/py-NATTEN/files/patch-pyproject.toml
@@ -1,13 +1,13 @@
 --- pyproject.toml.orig	2026-02-10 07:54:10 UTC
 +++ pyproject.toml
-@@ -29,9 +29,8 @@ requires = [
+@@ -29,9 +29,7 @@ requires = [
  
  [build-system]
  requires = [
 -  "setuptools >= 64",
 +  "setuptools",
-   "torch",
+-  "torch",
 -  "cmake >= 4.0",
    "build >= 1.3.0"
  ]
  build-backend = "setuptools.build_meta"