Use stencil path variable #482

Job	Run time
Interpreter (Debug)	7m 41s
Free-Threaded (Debug) (19)	12m 37s
i686-pc-windows-msvc/msvc (Debug)	18m 44s
i686-pc-windows-msvc/msvc (Release)	11m 24s
x86_64-pc-windows-msvc/msvc (Debug)	17m 30s
x86_64-pc-windows-msvc/msvc (Release)	10m 24s
aarch64-pc-windows-msvc/msvc (Debug)	4m 44s
aarch64-pc-windows-msvc/msvc (Release)	6m 32s
x86_64-apple-darwin/clang (Debug)	18m 52s
x86_64-apple-darwin/clang (Release)	8m 9s
aarch64-apple-darwin/clang (Debug)	8m 45s
aarch64-apple-darwin/clang (Release)	9m 43s
x86_64-unknown-linux-gnu/gcc (Debug)	8m 36s
x86_64-unknown-linux-gnu/gcc (Release)	5m 43s
aarch64-unknown-linux-gnu/gcc (Debug)	11s
aarch64-unknown-linux-gnu/gcc (Release)	9s
Aggregate stencil patches	0s
	2h 29m 44s

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