Add libssl-dev as dependency.

stage4/04-pisdr-system/00-packages

@@ -4,4 +4,5 @@ cmake
 build-essential
 git
 pkg-config
-re2c
+re2c
+libssl-dev

stage4/04-pisdr-system/03-run.sh

@@ -1,6 +1,6 @@
 #!/bin/bash -e
 
 on_chroot << EOF
-python3 -m pip -v install cmake
-python3 -m pip -v install ninja
+python3 -m pip install cmake
+python3 -m pip install ninja
 EOF