Get this error running the D blog about containerizing D in Docker

[WhatMeWorry]

https://dlang.org/blog/2019/03/14/containerize-your-d-server-application/

I'm following the excellent blog posting by Mr. Nacke, but I keep 
getting the following
error when I attempt to compile hellorest with dub.  Since 
everything is pretty much on
autopilot, Everything seems to have worked beautifully up to this 
step.


generic at generic-M93p:~/vibed-docker$ dub --build=release 
--compiler=ldc2 --verbose

Using dub registry url 'https://code.dlang.org/'
Refreshing local packages (refresh existing: true)...
Looking for local package map at 
/var/lib/dub/packages/local-packages.json
Looking for local package map at 
/home/generic/.dub/packages/local-packages.json
Determined package version using GIT: hellorest ~master
Refreshing local packages (refresh existing: false)...
Looking for local package map at 
/var/lib/dub/packages/local-packages.json
Looking for local package map at 
/home/generic/.dub/packages/local-packages.json
   Found dependency vibe-d 0.8.5-rc.1
     Found dependency vibe-d:redis 0.8.5-rc.1
       Found dependency vibe-d:http 0.8.5-rc.1
     o   o   o
Search for versions of openssl (1 package suppliers)
Return for openssl: [2.0.0+1.1.0h, 1.1.6+1.0.1g, 1.1.5+1.0.1g, 
1.1.4+1.0.1g, 1.1.3+1.0.1g, 1.1.2+1.0.1g, 1.1.1+1.0.1g, 
1.1.0+1.0.1g, 1.0.0+1.0.0e, ~master]
Search for versions of botan (1 package suppliers)
Ignoring version specification (>=0.0.0) for path based 
dependency ../memutils
Return for botan: [1.12.10, 1.12.9, 1.12.8, 1.12.7, 1.12.6, 
1.12.5, 1.12.4, 1.12.3, 1.12.2, 1.12.1, 1.12.0, 1.11.14, 1.11.13, 
1.11.12, 1.11.11, 1.11.10, ~master, ~merge-new-algos, 
~ldc-compat, ~fix-tls]
Search for versions of botan-math (1 package suppliers)
Return for botan-math: [1.0.3, 1.0.2, 1.0.1, 1.0.0, ~master]
Sub package botan:base doesn't exist in botan 1.12.10.
     o   o   o
Sub package botan:base doesn't exist in botan 1.11.10.
Sub package botan:base doesn't exist in botan ~master.
Sub package botan:base doesn't exist in botan ~merge-new-algos.
Sub package botan:base doesn't exist in botan ~ldc-compat.
Sub package botan:base doesn't exist in botan ~fix-tls.
Sub package botan:compression doesn't exist in botan 1.12.10.
     o   o   o
Sub package botan:compression doesn't exist in botan 1.11.10.
Sub package botan:compression doesn't exist in botan ~master.
Sub package botan:compression doesn't exist in botan 
~merge-new-algos.
Sub package botan:compression doesn't exist in botan ~ldc-compat.
Sub package botan:compression doesn't exist in botan ~fix-tls.
Sub package botan:tls doesn't exist in botan 1.12.10.
     o   o   o
Sub package botan:tls doesn't exist in botan 1.11.10.
Sub package botan:tls doesn't exist in botan ~master.
Sub package botan:tls doesn't exist in botan ~merge-new-algos.
Sub package botan:tls doesn't exist in botan ~ldc-compat.
Sub package botan:tls doesn't exist in botan ~fix-tls.
Sub package botan:passhash doesn't exist in botan 1.12.10.
     o   o   o
Sub package botan:passhash doesn't exist in botan 1.11.10.
Sub package botan:passhash doesn't exist in botan ~master.
Sub package botan:passhash doesn't exist in botan 
~merge-new-algos.
Sub package botan:passhash doesn't exist in botan ~ldc-compat.
Sub package botan:passhash doesn't exist in botan ~fix-tls.
Failed to load path based dependency memutils: No package file 
found in ../memutils/, expected one of 
dub.json/dub.sdl/package.json
Search for versions of mir-linux-kernel (1 package suppliers)
Return for mir-linux-kernel: [1.0.1, 1.0.0, 1.0.0-alpha2, 
1.0.0-alpha1, ~master]
Search for versions of diet-ng (1 package suppliers)
Return for diet-ng: [1.5.0, 1.4.5, 1.4.4, 1.4.3, 1.4.2, 1.4.1, 
1.4.0, 1.3.0, 1.2.1, 1.2.0, 1.1.4, 1.1.3, 1.1.2, 1.1.1, 1.1.0, 
1.0.0, 0.3.0, 0.2.1, 0.2.0, 0.1.0, 1.0.0-beta.3, 1.0.0-beta.2, 
1.0.0-beta.1, 1.0.0-alpha.2, 1.0.0-alpha.1, ~master, 
~dmd_segfault]
The dependency resolution process is taking too long. The 
dependency graph is likely hitting a pathological case in the 
resolution algorithm. Please file a bug report at 
https://github.com/dlang/dub/issues and mention the package 
recipe that reproduces this error.