Use matlisp from sourceforge

quicklisp · quicklisp · commit 3859c6a25126 · 2019-05-20T18:35:19.000-04:00
diff --git a/projects/matlisp/source.txt b/projects/matlisp/source.txt
@@ -1 +1 @@
-git https://github.com/matlisp/matlisp.git
+git https://git.code.sf.net/p/matlisp/git

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-git https://github.com/matlisp/matlisp.git`
	`1`	`+git https://git.code.sf.net/p/matlisp/git`