Append to environment variable in LLDB

Question

It is relatively easy to set environment variables in LLDB, via
settings set target.env-vars DEBUG=1

However, I can't seem to find a way to append to an environment variable.  The following doesn't work:
(lldb) settings set target.env-vars DEBUG=1
(lldb) settings set target.env-vars DEBUG=2$DEBUG
(lldb) settings show target.env-vars DEBUG
target.env-vars (dictionary of strings) =
  DEBUG=2$DEBUG

Igor Skochinsky · Answer

Referencing variables with $ only works in the shell or if the program specifically supports it. You simply have to paste or type the old value manually.
Possibly you can use Python scripting  to read and write the environment variables.

Append to environment variable in LLDB

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