But I'm still curios what the canonical approach may be

The win32/makefile.mk (written for dmake) in the perl source contains: 
#
# set this to point to cmd.exe (only needed if you use some
# alternate shell that doesn't grok cmd.exe style commands)
#
#SHELL        *= g:\winnt\system32\cmd.exe

[download]
I guess therefore that, in your makefile, you might want something like: 
SHELL        *= C:\path\to\your_shell.exe

[download]
Cheers,
Rob

In reply to Re^3: dmake and bash on Win? by syphilis
in thread let Makefile.PL to do the Readme file for me -- new target? by Discipulus

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