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-rw-r--r--gr-howto-write-a-block/Makefile.am2
-rw-r--r--gr-howto-write-a-block/config/Makefile.am2
-rw-r--r--gr-howto-write-a-block/python/Makefile.am2
-rw-r--r--gr-howto-write-a-block/swig/Makefile.am2
4 files changed, 4 insertions, 4 deletions
diff --git a/gr-howto-write-a-block/Makefile.am b/gr-howto-write-a-block/Makefile.am
index bf3c4294d..98368c211 100644
--- a/gr-howto-write-a-block/Makefile.am
+++ b/gr-howto-write-a-block/Makefile.am
@@ -23,7 +23,7 @@ ACLOCAL_AMFLAGS = -I config
include $(top_srcdir)/Makefile.common
-EXTRA_DIST += \
+EXTRA_DIST = \
bootstrap \
configure \
config.h.in \
diff --git a/gr-howto-write-a-block/config/Makefile.am b/gr-howto-write-a-block/config/Makefile.am
index e0cbadb8b..eb2ee6283 100644
--- a/gr-howto-write-a-block/config/Makefile.am
+++ b/gr-howto-write-a-block/config/Makefile.am
@@ -80,4 +80,4 @@ m4macros = \
# Don't install m4 macros anymore
# m4data_DATA = $(m4macros)
-EXTRA_DIST += $(m4macros)
+EXTRA_DIST = $(m4macros)
diff --git a/gr-howto-write-a-block/python/Makefile.am b/gr-howto-write-a-block/python/Makefile.am
index 5c4fbd3a8..c216cca29 100644
--- a/gr-howto-write-a-block/python/Makefile.am
+++ b/gr-howto-write-a-block/python/Makefile.am
@@ -22,7 +22,7 @@
include $(top_srcdir)/Makefile.common
TESTS = run_tests
-EXTRA_DIST += run_tests.in
+EXTRA_DIST = run_tests.in
modpython_PYTHON = \
__init__.py
diff --git a/gr-howto-write-a-block/swig/Makefile.am b/gr-howto-write-a-block/swig/Makefile.am
index c6b1786f6..d55c8070d 100644
--- a/gr-howto-write-a-block/swig/Makefile.am
+++ b/gr-howto-write-a-block/swig/Makefile.am
@@ -42,4 +42,4 @@ howto_swiginclude_headers = \
howto_square_ff.i \
howto_square2_ff.i
-EXTRA_DIST += $(howto_swiginclude_headers)
+EXTRA_DIST = $(howto_swiginclude_headers)