diff --git a/math/py-islpy/Makefile b/math/py-islpy/Makefile
index 096b12e3a51b..dbd44f19784a 100644
--- a/math/py-islpy/Makefile
+++ b/math/py-islpy/Makefile
@@ -1,45 +1,33 @@
 PORTNAME=	islpy
-DISTVERSION=	2024.2
+DISTVERSION=	2026.1
 CATEGORIES=	math
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Wrapper around isl, an integer set library
 WWW=		https://documen.tician.de/islpy/
 
 LICENSE=	MIT
 
 BUILD_DEPENDS=	cmake:devel/cmake-core \
-		${PYTHON_PKGNAMEPREFIX}nanobind>0:devel/py-nanobind@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}pcpp>0:devel/py-pcpp@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}scikit-build>0:devel/py-scikit-build@${PY_FLAVOR} \
 		${PY_SETUPTOOLS} \
 		${PYTHON_PKGNAMEPREFIX}wheel>0:devel/py-wheel@${PY_FLAVOR}
+BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}nanobind>=2.7:devel/py-nanobind@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}pcpp>0:devel/py-pcpp@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}scikit-build-core>=0.9.3:devel/py-scikit-build-core@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}typing-extensions>=4.5:devel/py-typing-extensions@${PY_FLAVOR}
 LIB_DEPENDS=	libbarvinok.so:math/barvinok \
 		libisl.so:devel/isl \
 		libpolylibgmp.so:math/polylib
 
-USES=		llvm:15 python shebangfix # w/out llvm:* the build fails to find LLVMgold.so
+USES=		cmake:indirect llvm:15 python # w/out llvm:* the build fails to find LLVMgold.so
 USE_PYTHON=	pep517 autoplist pytest
 
-SHEBANG_FILES=	configure.py
-
 TEST_ENV=	${MAKE_ENV} PYTHONPATH=${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}
 TEST_WRKSRC=	${WRKSRC}/test
 
-do-configure:
-	@cd ${WRKSRC} && \
-		${SETENV} ${MAKE_ENV} ./configure.py \
-			--enable-shared \
-			--python-exe=${PYTHON_CMD} \
-			--isl-inc-dir=${PREFIX}/include \
-			--isl-lib-dir=${PREFIX}/lib \
-			--no-use-shipped-imath \
-			--no-use-shipped-isl \
-			--use-barvinok \
-			--prefix=${PREFIX}
-
-# tests as of 2024.2: 31 passed, 1 skipped in 2.46s
+# tests as of 2026.1: 101 passed, 1 skipped, 7 warnings in 19.98s
 
 .include <bsd.port.mk>
diff --git a/math/py-islpy/distinfo b/math/py-islpy/distinfo
index 30672d91fc86..3d2c023e0ae6 100644
--- a/math/py-islpy/distinfo
+++ b/math/py-islpy/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1731039018
-SHA256 (islpy-2024.2.tar.gz) = 52d4dc4f020894cb93636f64744c087df58ab9f97676d8f1dcb4d510249bc7ab
-SIZE (islpy-2024.2.tar.gz) = 1399751
+TIMESTAMP = 1775881039
+SHA256 (islpy-2026.1.tar.gz) = e1e608e056caa682c611bbb55674cf11f172ddd3bb851d9daf13c198cbbf4010
+SIZE (islpy-2026.1.tar.gz) = 1370943
diff --git a/math/py-islpy/files/patch-pyproject.toml b/math/py-islpy/files/patch-pyproject.toml
deleted file mode 100644
index 6f6f46768969..000000000000
--- a/math/py-islpy/files/patch-pyproject.toml
+++ /dev/null
@@ -1,13 +0,0 @@
---- pyproject.toml.orig	2024-09-04 19:20:00 UTC
-+++ pyproject.toml
-@@ -8,10 +8,8 @@ requires = [
-     "setuptools>=64;python_version>='3.12'",
- 
-     "wheel>=0.34.2",
--    "cmake>=3.18",
-     "scikit-build",
-     "nanobind>=1.3",
--    "ninja",
-     "pcpp",
- ]
- build-backend = "setuptools.build_meta"