Use the right URL in cloudlab mode

defs.rkt

@@ -15,9 +15,14 @@
     'cloudlab
     'apt))
 
-(define apt-base-url "https://www.aptlab.net/")
+(define (cl?) (if (equal? tb-mode 'cloudlab) #t #f))
 
-(define tb (lambda () (if (equal? tb-mode 'cloudlab) "CloudLab" "Apt")))
+(define apt-base-url
+  (if (cl?)
+    "https://www.cloudlab.us"
+    "https://www.aptlab.net/"))
+
+(define tb (lambda () (if (cl?) "CloudLab" "Apt")))
 
 ; We want the 'version' to be the date of the most recent commit
 (define apt-version