Fix classfile API usages #385

Job	Run time
Select platforms	1s
alpine-linux-x64	0s
linux-x64-hs-nopch / build (debug)	15m 43s
linux-x64-hs-zero / build (debug)	12m 33s
linux-x86-hs / build (debug)	14m 16s
linux-x86-hs / build (release)	15m 42s
linux-cross-compile / build (aarch64)	15m 42s
linux-x64 / build (debug)	15m 43s
linux-cross-compile / build (arm)	15m 43s
linux-x64 / build (release)	15m 42s
linux-cross-compile / build (s390x)	15m 42s
linux-cross-compile / build (ppc64le)	15m 41s
linux-x64-hs-minimal / build (debug)	7m 3s
linux-cross-compile / build (riscv64)	15m 42s
docs / build (debug)	2m 41s
linux-x64-hs-optimized / build (debug)	15m 44s
macos-aarch64 / build (debug)	15m 43s
macos-x64 / build (debug)	15m 50s
macos-aarch64 / build (release)	14m 35s
macos-x64 / build (release)	15m 47s
windows-aarch64 / build (debug)	15m 37s
windows-aarch64 / build (release)	15m 36s
windows-x64 / build (debug)	8m 31s
windows-x64 / build (release)	12m 48s
windows-x64	1s
linux-x64	1s
macos-aarch64	1s
macos-x64	1s
Remove bundle artifacts	4s
	5h 8m 13s

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