Hi Julien!

> Maybe quote it? #:include-regexp '("\\.h$")

So I did:

```
            (replace 'install
              (lambda _
                (for-each (lambda (solution)
                            (with-directory-excursion solution
                                 ((assoc-ref copy:%standard-phases 'install)
                                        #:install-plan
                                        (list ("src" (string-append 
"include/" solution)
                                           #:include-regexp '("\\.h$"))))))
                          (list
                           "qtlockedfile"
                           "qtpropertybrowser"
                           "qtservice"
                           "qtsingleapplication"
                           "qtsoap"))))
```

I get Wrong type to apply: "src"

Regards,
RG.