diff options
| -rw-r--r-- | guix/build/haskell-build-system.scm | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/guix/build/haskell-build-system.scm b/guix/build/haskell-build-system.scm index 4d0bf6f38a..ef6cb316ee 100644 --- a/guix/build/haskell-build-system.scm +++ b/guix/build/haskell-build-system.scm @@ -217,6 +217,8 @@ given Haskell package." (if (not (vhash-assoc id seen)) (let ((dep-conf (string-append src "/" id ".conf")) (dep-conf* (string-append dest "/" id ".conf"))) + (when (not (file-exists? dep-conf)) + (error (format #f "File ~a does not exist. This usually means the dependency ~a is missing. Was checking conf-file ~a." dep-conf id conf-file))) (copy-file dep-conf dep-conf*) ;XXX: maybe symlink instead? (loop (vhash-cons id #t seen) (append lst (conf-depends dep-conf)))) |