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-rw-r--r--timezone/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/timezone/Makefile b/timezone/Makefile
index 93478d4948..d62d05a208 100644
--- a/timezone/Makefile
+++ b/timezone/Makefile
@@ -174,7 +174,7 @@ CFLAGS-scheck.c = -Wno-strict-prototypes -DNOID
 # leapseconds.
 testdata = $(objpfx)testdata
 define build-testdata
-GCONV_PATH=${common-objpfx}iconvdata \
+GCONV_PATH=${common-objpfx}iconvdata LANGUAGE=C LC_ALL=C \
   $(built-program-cmd) -d $(testdata) -y ./yearistype $<
 endef