[gatsby-plugin-ghost-images]: Uncritical build errors on macOS

[styxlab]

On macOS Catalina, I get random, uncritical build errors as shown below:

ERROR 

error copying file from /Users/joost/jamify-starter/.cache/caches/gatsby-plugin-ghost-images/56953e563a9361b4aa1a6a822a5bfd2c/writing-posts-with-ghost.png to /Users/joost/jamify-starter/public/static/fc44c1e564ddcebb36f6c873615a4e76/writing-posts-with-ghost.png [Error: ENOENT: no such file or directory, chmod '/Users/joost/jamify-starter/public/static/fc44c1e564ddcebb36f6c873615a4e76/writing-posts-with-ghost.png'] {

errno: -2,

code: 'ENOENT',

syscall: 'chmod',

path: '/Users/joost/jamify-starter/public/static/fc44c1e564ddcebb36f6c873615a4e76/writing-posts-with-ghost.png'

}

This problem should have been fixed long time ago on Gatsby PR 3859. This needs further investigation... Note that the files are present after build, so this is an uncritical error.

[styxlab]

System specs of test system

1. macOS High Sierra 10.13.2 or higher
2. node -v: v14.13.0
3. yarn -v: 1.22.5

Steps to reproduce issue

git clone https://github.com/styxlab/gatsby-starter-try-ghost.git jamify-starter
cd jamify-starter
yarn
yarn build

[styxlab]

Same root cause as #204. Will be followed up there.