--- ./texmf-dist/scripts/texlive/tlmgr.pl.orig	2020-04-30 17:37:55.089385823 +0200
+++ ./texmf-dist/scripts/texlive/tlmgr.pl	2020-04-30 17:38:21.193385804 +0200
@@ -74,7 +74,7 @@
   }
   if (-r "$bindir/$kpsewhichname") {
     # if not in bootstrapping mode => kpsewhich exists, so use it to get $Master
-    chomp($Master = `kpsewhich -var-value=SELFAUTOPARENT`);
+    chomp($Master = `kpsewhich -var-value=TEXMFROOT`);
   }
 
   # if we have no directory in which to find our modules,