Use depends for Linux daemon builds

doc/build-menu.md

@@ -38,6 +38,10 @@ packages. If they are missing, it asks before adding a standard
 `/etc/apt/sources.list.d/agrarian-ubuntu.sources` file for the host
 architecture.
 
+The Linux daemon option uses the deterministic native `depends/` build with Qt
+disabled, so Berkeley DB and other core libraries are built inside the checkout
+instead of being required as Ubuntu system development packages.
+
 Defaults
 --------
 

doc/build-ubuntu-24.md

@@ -30,26 +30,17 @@ For a headless Qt wallet smoke test, also install:
     sudo apt-get install -y \
       xvfb
 
-Daemon-only build
------------------
+Daemon build
+------------
 
-For the pool daemon, the GUI, tests, bench, ZMQ, and UPnP can be disabled:
-
-    ./autogen.sh
-    ./configure \
-      --without-gui \
-      --disable-tests \
-      --disable-bench \
-      --disable-zmq \
-      --with-miniupnpc=no \
-      --with-incompatible-bdb \
-      CXXFLAGS="-O0 -g0 --param ggc-min-expand=1 --param ggc-min-heapsize=32768"
-    make -j1
-
-The daemon helper runs the same path:
+For the daemon and CLI tools, use:
 
     JOBS=1 ./contrib/build-linux.sh
 
+The daemon helper builds/restores the native deterministic depends prefix first
+with Qt disabled. Berkeley DB, OpenSSL, Boost, libevent, GMP, and supporting
+libraries come from `depends/`, not from Ubuntu system headers.
+
 Qt wallet build
 ---------------