fix(registry): Return Build Script on Read-Only FS #676

Job	Run time
test stable --no-default-features	1m 2s
test stable	1m 1s
test stable --all-features	1m 35s
clippy	44s
doctest	42s
test nightly --no-default-features	51s
feature-checks	2m 57s
test nightly	1m 21s
test nightly --all-features	1m 40s
no-std	44s
wasm-unknown	1m 4s
test 1.81 --no-default-features	36s
wasm-wasi	1m 14s
test 1.81	59s
cfg-check	32s
docs	36s
examples	55s
feature-powerset	9m 15s
fmt	14s
	28m 2s

Provide feedback