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-rw-r--r--var/spack/repos/builtin/packages/py-lightning/package.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/var/spack/repos/builtin/packages/py-lightning/package.py b/var/spack/repos/builtin/packages/py-lightning/package.py
index f5131ec071..8bec9806ee 100644
--- a/var/spack/repos/builtin/packages/py-lightning/package.py
+++ b/var/spack/repos/builtin/packages/py-lightning/package.py
@@ -94,3 +94,6 @@ class PyLightning(PythonPackage):
depends_on("py-websocket-client@:2", type=("build", "run"))
depends_on("py-websockets@:12", when="@2.0.5:", type=("build", "run"))
depends_on("py-websockets@:11", when="@:2.0.4", type=("build", "run"))
+
+ # https://github.com/Lightning-AI/lightning/issues/18858
+ conflicts("^py-torch~distributed", when="@2.1.0")