[pass] openbsd - install

[Dekker]

I am trying to get pass to install on openbsd.
Simply running make gives me

Bad modifier: upper:]' '[:lower:]').sh
*** Parse error in /home/user1/src/github.com/password-store-1.6.5:
Missing dependency operator (Makefile:13) 
*** Parse error: Need an operator in 'endif' (Makefile:17) 
*** Parse error: Missing dependency operator (Makefile:18) 
*** Parse error: Need an operator in 'endif' (Makefile:20) 
*** Parse error: Missing dependency operator (Makefile:21) 
*** Parse error: Need an operator in 'endif' (Makefile:23)
*** Parse error: Missing dependency operator (Makefile:24)
*** Parse error: Need an operator in 'endif' (Makefile:26) Bad
modifier: upper:]' '[:lower:]').sh 
*** Parse error: Missing dependency operator (Makefile:39) 
*** Parse error: Need an operator in 'else' (Makefile:45) 
*** Parse error: Need an operator in 'endif' (Makefile:50)

If I simply edit the line to be:
PLATFORMFILE := src/platform/freebsd.sh

Then I get the following errors:

*** Parse error in /home/user1/src/github.com/password-store-1.6.5: Missing dependency operator (Makefile:13) 
*** Parse error: Need an operator in 'endif' (Makefile:17) 
*** Parse error: Missing dependency operator (Makefile:18) 
*** Parse error: Need an operator in 'endif' (Makefile:20) 
*** Parse error: Missing dependency operator (Makefile:21) 
*** Parse error: Need an operator in 'endif' (Makefile:23) 
*** Parse error: Missing dependency operator (Makefile:24) 
*** Parse error: Need an operator in 'endif' (Makefile:26) 
*** Parse error: Missing dependency operator (Makefile:39) 
*** Parse error: Need an operator in 'else' (Makefile:45)
*** Parse error: Need an operator in 'endif' (Makefile:50

This is about as far as I can get debugging my problem.
If anyone has this running on openbsd i'd love to know how its done.