--- config/Make.common.rules.orig	2015-06-23 15:30:20.000000000 +0000
+++ config/Make.common.rules	2015-06-27 23:55:59.468049240 +0000
@@ -19,7 +19,8 @@
 SHORT_VERSION   = 3.6
 SOVERSION	= 36
 
-INSTALL		= cp -fp
+override DESTDIR	=
+INSTALL		= %%INSTALL_PROGRAM%%
 INSTALL_PROGRAM	= ${INSTALL}
 INSTALL_LIBRARY	= ${INSTALL}
 INSTALL_DATA	= ${INSTALL}
@@ -49,13 +50,13 @@
 #
 # usr_dir_install means we want to install with a /usr style layout.
 #
-ifeq ($(prefix), /usr)
-    usr_dir_install = 1
-endif
-
-ifeq ($(prefix), /usr/local)
-    usr_dir_install = 1
-endif
+#ifeq ($(prefix), /usr)
+#    usr_dir_install = 1
+#endif
+#
+#ifeq ($(prefix), /usr/local)
+#    usr_dir_install = 1
+#endif
 
 #
 # A /usr style layout can be forced by setting USR_DIR_INSTALL=yes.
@@ -461,20 +463,24 @@
 	    then \
 		    ln -s Ice-$(VERSION)/slice $(DESTDIR)/$(prefix)/share/slice ; \
 	    fi ; \
+	fi
+
+	@if test -d $(DESTDIR)$(install_slicedir) ; \
+	then \
 	    cd $(top_srcdir)/../slice ; \
 	    for subdir in * ; \
 	    do \
 	        echo "Copying slice/$$subdir to $(DESTDIR)$(install_slicedir)..." ; \
 	        cp -fpr $$subdir $(DESTDIR)$(install_slicedir) ; \
 	    done ; \
-	    fi
+	fi
 
-	@if test ! -f $(DESTDIR)$(install_docdir)/ICE_LICENSE$(TEXT_EXTENSION) ; \
+	@if test ! -f $(DESTDIR)$(install_slicedir)/ICE_LICENSE$(TEXT_EXTENSION) ; \
 	then \
-	    $(call installdata,$(top_srcdir)/../ICE_LICENSE$(TEXT_EXTENSION),$(DESTDIR)$(install_docdir)) ; \
+	    $(call installdata,$(top_srcdir)/../ICE_LICENSE$(TEXT_EXTENSION),$(DESTDIR)$(install_slicedir)) ; \
 	fi
 
-	@if test ! -f $(DESTDIR)$(install_docdir)/LICENSE$(TEXT_EXTENSION) ; \
+	@if test ! -f $(DESTDIR)$(install_slicedir)/LICENSE$(TEXT_EXTENSION) ; \
 	then \
-	    $(call installdata,$(top_srcdir)/../LICENSE$(TEXT_EXTENSION),$(DESTDIR)$(install_docdir)) ; \
+	    $(call installdata,$(top_srcdir)/../LICENSE$(TEXT_EXTENSION),$(DESTDIR)$(install_slicedir)) ; \
 	fi