--- fossil-2.10/autosetup/local.tcl.orig        2020-02-25 22:16:02.166000000 -0600
+++ fossil-2.10/autosetup/local.tcl     2020-02-25 22:19:32.389000000 -0600
@@ -12,7 +12,7 @@
                        return [parse-tclconfig-sh-file $p/tclConfig.sh]
                }
                # Some systems allow for multiple versions
-               foreach libpath {lib/tcl8.6 lib/tcl8.5 lib/tcl8.4 lib/tcl tcl lib}  {
+               foreach libpath {lib/tcl8.6 lib/tcl8.5 lib/tcl8.4 lib/tcl tcl lib lib64}  {
                        if {[file exists $p/$libpath/tclConfig.sh]} {
                                return [parse-tclconfig-sh-file $p/$libpath/tclConfig.sh]
                        }