Index: head/Mk/bsd.port.mk
===================================================================
--- head/Mk/bsd.port.mk
+++ head/Mk/bsd.port.mk
@@ -2057,14 +2057,15 @@
 SCRIPTS_ENV+=	${INSTALL_MACROS}
 
 # Macro for copying entire directory tree with correct permissions
-COPYTREE_BIN=	${SH} -c '(${FIND} -d $$0 $$2 | ${CPIO} -dumpl $$1 >/dev/null \
-					2>&1) && \
-					${FIND} -d $$0 $$2 -type d -exec chmod 755 $$1/{} \; && \
-					${FIND} -d $$0 $$2 -type f -exec chmod ${BINMODE} $$1/{} \;' --
-COPYTREE_SHARE=	${SH} -c '(${FIND} -d $$0 $$2 | ${CPIO} -dumpl $$1 >/dev/null \
-					2>&1) && \
-					${FIND} -d $$0 $$2 -type d -exec chmod 755 $$1/{} \; && \
-					${FIND} -d $$0 $$2 -type f -exec chmod ${SHAREMODE} $$1/{} \;' --
+# In the -exec shell commands, we add add a . as the first argument, it would
+# end up being $0 aka the script name, which is not part of $@, so we force it
+# to be able to use $@ directly.
+COPYTREE_BIN=	${SH} -c '(${FIND} -Ed $$0 $$2 | ${CPIO} -dumpl $$1 >/dev/null 2>&1) && \
+						   ${FIND} -Ed $$0 $$2 \(   -type d -exec ${SH} -c '\''cd '\''$$1'\'' && chmod 755 "$$@"'\'' -- . {} + \
+												 -o -type f -exec ${SH} -c '\''cd '\''$$1'\'' && chmod ${BINMODE} "$$@"'\'' -- . {} + \)' --
+COPYTREE_SHARE=	${SH} -c '(${FIND} -Ed $$0 $$2 | ${CPIO} -dumpl $$1 >/dev/null 2>&1) && \
+						   ${FIND} -Ed $$0 $$2 \(   -type d -exec ${SH} -c '\''cd '\''$$1'\'' && chmod 755 "$$@"'\'' -- . {} + \
+												 -o -type f -exec ${SH} -c '\''cd '\''$$1'\'' && chmod ${SHAREMODE} "$$@"'\'' -- . {} + \)' --
 
 # The user can override the NO_PACKAGE by specifying this from
 # the make command line