Fix error compiling with ruby.wasm #956

Job	Run time
ruby-versions / Generate Ruby versions	4s
ubuntu-latest debug	50s
ubuntu-latest 2.7	1m 24s
ubuntu-latest 3.2	57s
macos-latest 3.1	41s
ubuntu-latest 3.1	53s
ubuntu-latest 3.4	52s
ubuntu-latest head	44s
ubuntu-latest 3.3	58s
macos-latest head	36s
macos-14 3.4	32s
ubuntu-latest 4.0	45s
macos-latest debug	39s
macos-latest 3.2	37s
ubuntu-latest 3.0	49s
macos-14 3.1	38s
windows-latest 3.4	3m 24s
macos-latest 3.3	46s
macos-latest 2.7	1m 5s
macos-14 3.3	33s
macos-latest 3.0	42s
macos-14 head	30s
windows-latest mswin	2m 30s
macos-latest 3.4	34s
windows-latest 4.0	2m 50s
macos-14 3.2	29s
macos-14 3.0	32s
macos-14 debug	37s
windows-latest 3.3	3m 0s
macos-14 2.7	1m 13s
macos-latest 4.0	41s
macos-14 4.0	33s
windows-latest mingw	2m 55s
windows-latest 2.7	5m 6s
windows-latest head	2m 53s
	42m 52s

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