better build cache #195

Job	Run time
build-amd64 (nvidia/cuda:12.2.2-cudnn8-devel-ubuntu22.04, humble, jammy-humble-cuda12.2-opengl)	32m 40s
build-amd64 (nvidia/cuda:12.2.2-cudnn8-devel-ubuntu22.04, humble, jammy-humble-cuda12.2-opengl)	32m 40s
build-arm64 (nvidia/cuda:12.2.2-cudnn8-devel-ubuntu22.04, humble, jammy-humble-cuda12.2-opengl-ar...	40m 32s
build-arm64 (nvidia/cuda:12.2.2-cudnn8-devel-ubuntu22.04, humble, jammy-humble-cuda12.2-opengl-ar...	40m 32s
build-amd64 (nvidia/cuda:12.6.2-cudnn-devel-ubuntu22.04, humble, jammy-humble-cuda12.6-opengl)	29m 45s
build-amd64 (nvidia/cuda:12.6.2-cudnn-devel-ubuntu22.04, humble, jammy-humble-cuda12.6-opengl)	29m 45s
build-arm64 (nvidia/cuda:12.6.2-cudnn-devel-ubuntu22.04, humble, jammy-humble-cuda12.6-opengl-arm64)	42m 17s
build-arm64 (nvidia/cuda:12.6.2-cudnn-devel-ubuntu22.04, humble, jammy-humble-cuda12.6-opengl-arm64)	42m 18s
build-amd64 (nvidia/cuda:12.6.3-cudnn-devel-ubuntu24.04, rolling, noble-rolling-cuda12.6-opengl)	34m 59s
build-amd64 (nvidia/cuda:12.6.3-cudnn-devel-ubuntu24.04, rolling, noble-rolling-cuda12.6-opengl)	34m 59s
build-arm64 (nvidia/cuda:12.6.3-cudnn-devel-ubuntu24.04, rolling, noble-rolling-cuda12.6-opengl-a...	38m 2s
build-arm64 (nvidia/cuda:12.6.3-cudnn-devel-ubuntu24.04, rolling, noble-rolling-cuda12.6-opengl-a...	1h 13m 29s
	7h 51m 58s

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