local LDC install conflicts with system install cause linker error

[mw]

Hi,

My build suddenly failed after my OS upgrade to Ubuntu 22.04 LTS

$ cat /etc/issue.net
Ubuntu 22.04 LTS

$ dpkg -l | grep -i ldc
ii  ldc                                        1:1.28.0-1ubuntu1  
                      amd64        LLVM D Compiler
ii  libphobos2-ldc-shared-dev                  1:1.28.0-1ubuntu1  
                      amd64        LLVM D Compiler - Standard and 
runtime libraries, imports
ii  libphobos2-ldc-shared98:amd64              1:1.28.0-1ubuntu1  
                      amd64        LLVM D Compiler - Standard and 
runtime libraries

But, I'm using my local install ldc 1.29's dub to build, which 
pick up the ldc2 compiler correctly (see below the build dir 
name), but I run into lots of link errors:

/usr/bin/ld: 
//home//.dub/packages/dateparser-3.0.4/dateparser/source/dateparser/package.d:752: undefined reference to `_D3std8datetime8timezone9LocalTime7stdNameMxFNbNdNlNeZAya'

...

/usr/bin/ld: 
/home//.dub/packages/requests-1.1.7/requests/.dub/build/std-unittest-linux.posix-x86_64-ldc_v1.29.0-6C686308E30390EDCF080BEEC5E5A4C4/librequests.a(requests.pool.o):(.data._D29TypeInfo_S4core4time8Duration6__initZ+0x40): undefined reference to `_D4core4time8Duration8__xopCmpMxFKxSQBiQBgQBeZi'

After uninstall system packages:

$ sudo apt-get purge ldc libphobos2-ldc-shared98 
libphobos2-ldc-shared-dev

The build succeed. But I'm just wondering why it mess up the 
local install and the system install; maybe it confuse the two 
conf files?

/my/local/ldc2/etc/ldc2.conf

/etc/ldc2.conf