guix: texlive-build-system: Handle doc-only packages gracefully.

* guix/build/texlive-build-system.scm (install): Always create #$output, even
if it is empty.

1 files changed, 4 insertions, 2 deletions

diff --git a/guix/build/texlive-build-system.scm b/guix/build/texlive-build-system.scm
index 4f3938213f..eeb23c4645 100644
--- a/guix/build/texlive-build-system.scm
+++ b/guix/build/texlive-build-system.scm
@@ -207,8 +207,10 @@ runfile to replace.  If a file has no matching runfile, it is ignored."
       (let ((doc-dir (string-append (or doc out) "/share/texmf-dist/doc")))
         (mkdir-p doc-dir)
         (copy-recursively "doc" doc-dir)))
-    ;; Handle runfiles.
-    (let ((texmf (string-append (assoc-ref outputs "out") "/share/texmf-dist")))
+    ;; Install runfiles.  The package may not contain any, though.  Create
+    ;; #$output anyway to handle this situation gracefully.
+    (mkdir-p out)
+    (let ((texmf (string-append out "/share/texmf-dist")))
       (for-each (lambda (root)
                   (let ((destination (string-append texmf "/" root)))
                     (mkdir-p destination)