gnu: Add texlive-ly1.

* gnu/packages/tex.scm: New package.

gnu/packages/tex.scm

@@ -8033,3 +8033,25 @@ Type 1 and OTF formats, with supporting files as necessary.")
     (license (list (license:fsf-free
                     "http://mirrors.ctan.org/fonts/xcharter/README")
                    license:lppl1.3))))
+
+(define-public texlive-ly1
+  (package
+    (inherit (simple-texlive-package
+              "texlive-ly1"
+              (list "/doc/fonts/ly1/"
+                    "/fonts/enc/dvips/ly1/"
+                    "/fonts/map/dvips/ly1/"
+                    "/fonts/tfm/adobe/ly1/"
+                    "/fonts/vf/adobe/ly1/"
+                    "/tex/latex/ly1/")
+              (base32
+               "0wjyw0risgvrq97zfciglwy1f4msvfslln6pz0q8yzzx8wsv3zgq")
+              #:trivial? #t))
+    (home-page "https://www.ctan.org/pkg/ly1")
+    (synopsis "Support for LY1 LaTeX encoding")
+    (description "The legacy @emph{texnansi} (TeX and ANSI) encoding
+is known in the LaTeX scheme of things as @emph{LY1} encoding.  The
+@code{ly1} bundle includes metrics and LaTeX macros to use the three
+basic Adobe Type 1 fonts (Times, Helvetica and Courier) in LaTeX using
+LY1 encoding.")
+    (license license:lppl1.0+)))