diff --git a/.cirrus.yml b/.cirrus.yml
index 1323ce8e95..b96146f230 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -10,7 +10,7 @@ btest_jobs: &BTEST_JOBS 4
 btest_retries: &BTEST_RETRIES 2
 memory: &MEMORY 16GB
 
-config: &CONFIG --build-type=release --disable-broker-tests --prefix=$CIRRUS_WORKING_DIR/install --ccache --enable-werror
+config: &CONFIG --build-type=release --disable-broker-tests --prefix=$CIRRUS_WORKING_DIR/install --ccache --enable-werror -D FETCHCONTENT_FULLY_DISCONNECTED:BOOL=ON
 no_spicy_config: &NO_SPICY_CONFIG --build-type=release --disable-broker-tests --disable-spicy --prefix=$CIRRUS_WORKING_DIR/install --ccache --enable-werror
 static_config: &STATIC_CONFIG --build-type=release --disable-broker-tests --enable-static-broker --enable-static-binpac --prefix=$CIRRUS_WORKING_DIR/install --ccache --enable-werror
 binary_config: &BINARY_CONFIG --prefix=$CIRRUS_WORKING_DIR/install --libdir=$CIRRUS_WORKING_DIR/install/lib --binary-package --enable-static-broker --enable-static-binpac --disable-broker-tests --build-type=Release --ccache --enable-werror