diff --git a/pkgs/applications/editors/emacs-modes/melpa-packages.json b/pkgs/applications/editors/emacs-modes/melpa-packages.json
index 2e8d323eaa30..5e409ac81a26 100644
--- a/pkgs/applications/editors/emacs-modes/melpa-packages.json
+++ b/pkgs/applications/editors/emacs-modes/melpa-packages.json
@@ -41937,7 +41937,7 @@
     "matlab-mode": {
         "fetch": {
             "tag": "fetchcvs",
-            "url": ":pserver:anonymous@matlab-emacs.cvs.sourceforge.net:/cvsroot/matlab-emacs",
+            "cvsRoot": ":pserver:anonymous@matlab-emacs.cvs.sourceforge.net:/cvsroot/matlab-emacs",
             "module": "matlab-emacs",
             "sha256": "694652e361b9d15a3f1542d45b43c6516f20030dbaa8a058b5fdb4c833885465"
         },
@@ -43711,4 +43711,4 @@
             "coffee-mode"
         ]
     }
-}
\ No newline at end of file
+}
diff --git a/pkgs/applications/editors/emacs-modes/melpa-stable-packages.json b/pkgs/applications/editors/emacs-modes/melpa-stable-packages.json
index 503dc20c50da..ccf76ad40e1d 100644
--- a/pkgs/applications/editors/emacs-modes/melpa-stable-packages.json
+++ b/pkgs/applications/editors/emacs-modes/melpa-stable-packages.json
@@ -7690,7 +7690,7 @@
     "swbuff": {
         "fetch": {
             "tag": "fetchcvs",
-            "url": ":pserver:anonymous@emhacks.cvs.sourceforge.net:/cvsroot/emhacks",
+            "cvsRoot": ":pserver:anonymous@emhacks.cvs.sourceforge.net:/cvsroot/emhacks",
             "module": "emhacks/swbuff.el",
             "sha256": "c579839fb395f1f778683324269269ca3d916995177804ca5dff3548007ec4b5"
         },
@@ -21193,7 +21193,7 @@
     "matlab-mode": {
         "fetch": {
             "tag": "fetchcvs",
-            "url": ":pserver:anonymous@matlab-emacs.cvs.sourceforge.net:/cvsroot/matlab-emacs",
+            "cvsRoot": ":pserver:anonymous@matlab-emacs.cvs.sourceforge.net:/cvsroot/matlab-emacs",
             "module": "matlab-emacs",
             "sha256": "694652e361b9d15a3f1542d45b43c6516f20030dbaa8a058b5fdb4c833885465"
         },
@@ -22223,4 +22223,4 @@
             "coffee-mode"
         ]
     }
-}
\ No newline at end of file
+}