Git for Windows no longer works

[tigerhawkvok]

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After adding a small patch to support the C:\Program Files\ destination:

# Install support:
install:
	install -d -m 0755 "$(INSTALL_LIB)/"
	install -C -m 0755 $(LIB) "$(INSTALL_LIB)/"
	install -d -m 0755 "$(INSTALL_EXT)/"
	install -C -m 0644 $(EXTS) "$(INSTALL_EXT)/"
	install -d -m 0755 $(INSTALL_MAN1)/
	install -C -m 0644 $(MAN1)/$(NAME).1 $(INSTALL_MAN1)/

the install command no longer errors out, but instead gives an error that makes no sense to me:

AFAIK I don't have bash plus, should I? If so, it should probably be in the install directions.