diff --git a/Makefile.in b/Makefile.in
index aca5a16..2e49f0a 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -8,6 +8,7 @@ subdirs = lib include src
 
 top_srcdir = @top_srcdir@
 srcdir = @srcdir@
+datarootdir = @datarootdir@
 VPATH = @srcdir@
 top_objdir = .
 
diff --git a/lib/ruby/Makefile.in b/lib/ruby/Makefile.in
index b31ce7f..e099e1b 100644
--- a/lib/ruby/Makefile.in
+++ b/lib/ruby/Makefile.in
@@ -29,10 +29,10 @@ ccenergy.rb    cclambda.rb    chkpt.rb       color.rb       deriv2.rb      frequ
 cceom.rb       ccsort.rb      cints.rb       cphf.rb        detci.rb       input.rb       optking.rb     psi3.rb        testcases.rb 
 
 install: $(RUBYSRC)
-	$(MKDIRS) $(rubydatadir)
+	$(MKDIRS) $(DESTDIR)/$(rubydatadir)
 	for rbfile in $(RUBYSRC); \
           do \
-            ($(INSTALL_DATA) $(srcdir)/$${rbfile} $(rubydatadir)) || exit 1; \
+            ($(INSTALL_DATA) $(srcdir)/$${rbfile} $(DESTDIR)/$(rubydatadir)) || exit 1; \
           done
 
 install_man: 
diff --git a/src/bin/Makefile.in b/src/bin/Makefile.in
index e1abb46..4eddf8d 100644
--- a/src/bin/Makefile.in
+++ b/src/bin/Makefile.in
@@ -65,6 +65,7 @@ targetclean:
 
 top_srcdir = @top_srcdir@
 srcdir = @srcdir@
+datarootdir = @datarootdir@
 top_objdir = ../..
 
 $(top_srcdir)/configure: $(top_srcdir)/configure.ac $(top_srcdir)/aclocal.m4