build fixes

resolve-debbuilddeps.sh

@@ -15,8 +15,10 @@ SCHROOTNAME="$1"
 sed 's,@[^@]*@, dummytext,g' debian/control.in > debian/control
 
 if test -n "${SCHROOTNAME}"; then
+  schroot -c "${SCHROOTNAME}" -- apt-get install -y dpkg-dev
   DEPS=$(schroot -c "${SCHROOTNAME}" -- dpkg-checkbuilddeps 2>&1 || true)
 else
+  apt-get install -y dpkg-dev
   DEPS=$(dpkg-checkbuilddeps 2>&1 || true)
 fi
 DEPS=$(echo "$DEPS" | sed -n '/Unmet build dependencies/ { s,.*Unmet build dependencies: ,,g; s, ([^)]*),,g; s, *| *,|,g; p}')