Is the Makefile.PL file calling the Wx dlls provided by Alien::wxWidgets? Maybe some probing is needed to check what path is being used.

And FWIW, I cannot get Alien::wxWidgets to compile using Strawberry perl so I cannot test it myself.

C:\BERRYB~1\526~1.2_6\data\.cpanm\work\1566800678.620\Alien-wxWidgets-
+0.69>perl Makefile.PL
# running Build.PL
Do you want to fetch and build wxWidgets from sources? [yes ]
yes
Which wxWidgets version? (2.8.10, 2.8.11, 2.8.12, 2.9.0, 2.9.1, 2.9.2,
+ 2.9.3, 2.9.4, 3.0.0, 3.0.1, 3.0.2) [3.0.2 ]
3.0.2
Which archive type? [tar.bz2 ]
tar.bz2
Do you want to include OpenGL support [yes ]no
Created MYMETA.yml and MYMETA.json
Creating new 'Build' script for 'Alien-wxWidgets' version '0.69'


C:\BERRYB~1\526~1.2_6\data\.cpanm\work\1566800678.620\Alien-wxWidgets-
+0.69>Build
Building Alien-wxWidgets
if not exist gcc_mswudll mkdir gcc_mswudll
process_begin: CreateProcess(NULL, C:/berrybrew/5.26.2_64_PDL/perl/sit
+e/bin/ -c "if not exist gcc_mswudll mkdir gcc_mswudll", ...) failed.
make (e=5): Access is denied.
gmake: [makefile.gcc:5089: gcc_mswudll] Error 5 (ignored)
if not exist ..\..\lib\gcc_dll mkdir ..\..\lib\gcc_dll
process_begin: CreateProcess(NULL, C:/berrybrew/5.26.2_64_PDL/perl/sit
+e/bin/ -c "if not exist ..\..\lib\gcc_dll mkdir ..\..\lib\gcc_dll", .
+..) failed.
make (e=5): Access is denied.
gmake: *** [makefile.gcc:5639: ..\..\lib\gcc_dll] Error 5
system: gmake -f makefile.gcc all  UNICODE=1 MSLU=0 BUILD=release SHAR
+ED=1  DEBUG_INFO=default DEBUG_FLAG=1 LDFLAGS=" -m64" CPPFLAGS="-m64"
+: 512 at inc/My/Build/Win32.pm line 284.
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