bug#26255: [PATCH] gnu: gnuplot: Enable tikz backend.

[Danny Milosavljevic]

* gnu/packages/maths.scm (gnuplot)[inputs]: Add lua.
---
 gnu/packages/maths.scm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm
index ed13556cb..a5cdacb63 100644
--- a/gnu/packages/maths.scm
+++ b/gnu/packages/maths.scm
@@ -70,6 +70,7 @@
   #:use-module (gnu packages less)
   #:use-module (gnu packages lisp)
   #:use-module (gnu packages logging)
+  #:use-module (gnu packages lua)
   #:use-module (gnu packages gnome)
   #:use-module (gnu packages guile)
   #:use-module (gnu packages xorg)
@@ -495,7 +496,8 @@ singular value problems.")
     (inputs `(("readline" ,readline)
               ("cairo" ,cairo)
               ("pango" ,pango)
-              ("gd" ,gd)))
+              ("gd" ,gd)
+              ("lua" ,lua)))
     (native-inputs `(("pkg-config" ,pkg-config)
                      ("texlive" ,texlive-minimal)))
     (home-page "http://www.gnuplot.info";)