Build error: `Could not find module ‘Text.Regex’`

[barracuda156]

src/Main.lhs:15:3: error:
    Could not find module ‘Text.Regex’
    Perhaps you meant Text.Read (from base-4.18.2.0)
    Use -v (or `:set -v` in ghci) to see a list of the files searched for.
   |
15 | > import Text.Regex ( matchRegex, mkRegexWithOpts )
   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
make: *** [lhs2TeX] Error 1

Where is this module coming from?