It needs to be in EXTRA_DIST, otherwise it is not put in the dist.
---
builder/Makefile.am | 1 +
1 file changed, 1 insertion(+)
diff --git a/builder/Makefile.am b/builder/Makefile.am
index f0cb1dd..2dc9d23 100644
--- a/builder/Makefile.am
+++ b/builder/Makefile.am
@@ -27,6 +27,7 @@ AM_CFLAGS = \
EXTRA_DIST = \
$(SOURCES) \
+ libguestfs.gpg \
virt-builder.pod \
virt-index-validate.pod \
test-virt-builder.sh \
--
1.8.3.1