some troubles on installing deja-dup from source code _(Learning how to install programs on linux...)_ deja-dup source code can be downloaded on its GitHub repo. There is a makefile con the package. Once into the folder I run: santi@eoan:~/deja-dup$ make And get the error: The Meson build system Project name: deja-dup Project version: 40.6 ... Run-time dependency goa-1.0 found: NO (tried pkgconfig and cmake) Run-time dependency json-glib-1.0 found: NO (tried pkgconfig and cmake) meson.build:36:0: ERROR: Dependency "json-glib-1.0" not found, tried pkgconfig and cmake A full log can be found at /home/santi/deja-dup/builddir/meson-logs/meson-log.txt make: *** [Makefile:15: configure] Error 1 I'm running lubuntu eoan, where deja-dup is updated, or almost. I wanted to know what's going wrong for future reference though.

An error of the form


Run-time dependency goa-1.0 found: NO (tried pkgconfig and cmake)


means that the build is looking for a file named `goa-1.0.pc` (for `pkgconfig`) or `Findgoa-1.0.cmake` file (which isn’t what a CMake dependency would look like, but the build system can’t know that).

To find that on Lubuntu, install `apt-file`, update your `apt` indexes, then run


apt-file search goa-1.0.pc


This will reveal that you need to install `libgoa-1.0-dev`. For `json-glib-1.0`, the same process will show that you need to install `libjson-glib-dev`.

Install both packages and you should find that those build errors have been fixed.

For a program such as Déjà Dup which is packaged in Debian, you can quickly see the list of required build dependencies by looking at the `Build-Depends` entry in the `debian/control` file.