05/07: gnu: libngspice: Update source URI list.

[guix-commits]

efraim pushed a commit to branch master
in repository guix.

commit b4731adf820ab0f1b49d6a17778f158bd85d7258
Author: Efraim Flashner <efraim@flashner.co.il>
AuthorDate: Mon Nov 9 11:21:35 2020 +0200

    gnu: libngspice: Update source URI list.
    
    * gnu/packages/engineering.scm (libngspice)[source]: Add alternate
    source URI.
---
 gnu/packages/engineering.scm | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/gnu/packages/engineering.scm b/gnu/packages/engineering.scm
index 2e1ffa1..acf048d 100644
--- a/gnu/packages/engineering.scm
+++ b/gnu/packages/engineering.scm
@@ -1537,8 +1537,12 @@ high-performance parallel differential evolution (DE) 
optimization algorithm.")
     (version "28")
     (source (origin
               (method url-fetch)
-              (uri (string-append 
"mirror://sourceforge/ngspice/ng-spice-rework/"
-                                  version "/ngspice-" version ".tar.gz"))
+              (uri (list
+                     (string-append 
"mirror://sourceforge/ngspice/ng-spice-rework/"
+                                    version "/ngspice-" version ".tar.gz")
+                     (string-append 
"mirror://sourceforge/ngspice/ng-spice-rework/"
+                                    "old-releases/" version
+                                    "/ngspice-" version ".tar.gz")))
               (sha256
                (base32
                 "0rnz2rdgyav16w7wfn3sfrk2lwvvgz1fh0l9107zkcldijklz04l"))