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-rw-r--r--win32/setup.mak3
1 files changed, 3 insertions, 0 deletions
diff --git a/win32/setup.mak b/win32/setup.mak
index 9ca6daa5c6..39a00e8fae 100644
--- a/win32/setup.mak
+++ b/win32/setup.mak
@@ -154,6 +154,9 @@ MSC_VER = _MSC_VER
-program-name-:
@type << >>$(MAKEFILE)
+!ifdef RUBY_PREFIX
+RUBY_PREFIX = $(RUBY_PREFIX)
+!endif
!ifdef RUBY_SUFFIX
RUBY_SUFFIX = $(RUBY_SUFFIX)
!endif