diff --git a/repos/spack_repo/builtin/packages/libseccomp/fix-pyx-copy.patch b/repos/spack_repo/builtin/packages/libseccomp/fix-pyx-copy.patch
new file mode 100644
index 00000000000..287e5a58b20
--- /dev/null
+++ b/repos/spack_repo/builtin/packages/libseccomp/fix-pyx-copy.patch
@@ -0,0 +1,11 @@
+--- a/src/python/Makefile.in	2026-02-19
++++ b/src/python/Makefile.in	2026-02-19
+@@ -36,7 +36,7 @@
+ all-local: build
+ 
+ build: ../libseccomp.la libseccomp.pxd seccomp.pyx setup.py
+-	[ ${srcdir} = ${builddir} ] || cp ${srcdir}/seccomp.pyx ${builddir}
++	test -f ${builddir}/seccomp.pyx || cp ${srcdir}/seccomp.pyx ${builddir}
+ 	${PY_BUILD} && touch build
+ 
+ install-exec-local: build
diff --git a/repos/spack_repo/builtin/packages/libseccomp/package.py b/repos/spack_repo/builtin/packages/libseccomp/package.py
index 736b4689ba4..25e7d5295ac 100644
--- a/repos/spack_repo/builtin/packages/libseccomp/package.py
+++ b/repos/spack_repo/builtin/packages/libseccomp/package.py
@@ -35,6 +35,8 @@ class Libseccomp(AutotoolsPackage, PythonExtension):
         # https://github.com/seccomp/libseccomp/commit/afbde6ddaec7c58c3b281d43b0b287269ffca9bd
         depends_on("python@:3.11", type=("run", "link", "build"), when="@:2.5")
         depends_on("py-setuptools", type="build", when="@2.6:")
+        # upstream PR: https://github.com/seccomp/libseccomp/pull/482
+        patch("fix-pyx-copy.patch", when="@2.6")
 
     def configure_args(self):
         return self.enable_or_disable("python", variant="python")