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-rw-r--r--timezone/Makefile4
1 files changed, 2 insertions, 2 deletions
diff --git a/timezone/Makefile b/timezone/Makefile
index a4ff4fe73c..e308cca3ff 100644
--- a/timezone/Makefile
+++ b/timezone/Makefile
@@ -35,10 +35,10 @@ tzbases := africa antarctica asia australasia europe northamerica \
 tzlinks := backward systemv
 tzfiles := $(tzbases) $(tzlinks)
 
-generated := $(addprefix z.,$(tzfiles))
+generated += $(addprefix z.,$(tzfiles))
 install-sbin := zic zdump
 
-generated-dirs = testdata
+generated-dirs += testdata
 
 CPPFLAGS-zic = -DNOT_IN_libc