Table of Contents _________________ 1. The context 2. What I've tried 3. What I'm looking for
1 The context ============= I'm trying to write the simplest package definition that does nothing in order to be able to generate multiple generations on the fly and experiment with the `guix package' flags that act on generations. I asked the same question in <irc://irc.libera.chat/guix> and someone recommended me using the `my-hello' package shown as an example in (guix-cookbook) GUIX_PACKAGE_PATH. I replied to him that I didn't want to use that definition because it downloads a file and performs some compilation steps and I was looking for something simpler. The same user replied "you could copy the sources to a local directory, and edit the file description so it's url-fetch method and the uri is the absolute path to where the pkg is.". I haven't found examples on this, so I thought it would be difficult to do it. I found several examples on using `url-fetch', so I decided to write a package that downloads a single small file from the Internet (e.g. <https://www.gnu.org/graphics/heckert_gnu.transp.small.png> ) and install it under a directory. This is what I tried to write but with no avail. The next section shows what I tried. 2 What I've tried ================= The following is the package that I wrote. ,---- | (define-module (my-simple) | #:use-module (guix licenses) | #:use-module (guix packages) | #:use-module (guix gexp) | #:use-module (guix build-system trivial) | #:use-module (guix download)) | | (define-public my-simple-1 | (package | (name "my-simple-1") | (version "2.10") | (source (origin | (method url-fetch) | (uri " https://www.gnu.org/graphics/heckert_gnu.transp.small.png";) | (sha256 (base32 "1686w7x3qk85i5693nrj7lbdh64232fdsqd5rgxgijv1y39rldbr")))) | (build-system trivial-build-system) | (synopsis "My synopsis") | (description "My description") | (home-page "https://example.org/";) | (license gpl3+))) `---- If I try to install the package I get the following error. Fortunately, it shows that there's a build log. ,---- | export GUIX_PACKAGE_PATH=~/my-packages | guix package -i my-simple-1 | echo Exit code: $? `---- ,---- | The following package will be installed: | my-simple-1 2.10 | | substitute: substitute: [Kupdating substitutes from 'https://ci.guix.gnu.org'... 0.0% substitute: [Kupdating substitutes from 'https://ci.guix.gnu.org'... 100.0% | substitute: substitute: [Kupdating substitutes from 'https://bordeaux.guix.gnu.org'... 0.0% substitute: [Kupdating substitutes from 'https://bordeaux.guix.gnu.org'... 100.0% | The following derivations will be built: | /gnu/store/lsqc0zjvqmnc8vbkk36g9jy5bcnmk455-profile.drv | /gnu/store/a1cxm06cdacqry9x0c14pnb4s491b6z9-my-simple-1-2.10.drv | | building /gnu/store/a1cxm06cdacqry9x0c14pnb4s491b6z9-my-simple-1-2.10.drv... | builder for `/gnu/store/a1cxm06cdacqry9x0c14pnb4s491b6z9-my-simple-1-2.10.drv' failed to produce output path `/gnu/store/a8p80lxgcar332ln81ss6pl9xr0wajsh-my-simple-1-2.10' | build of /gnu/store/a1cxm06cdacqry9x0c14pnb4s491b6z9-my-simple-1-2.10.drv failed | View build log at '/var/log/guix/drvs/a1/cxm06cdacqry9x0c14pnb4s491b6z9-my-simple-1-2.10.drv.gz'. | cannot build derivation `/gnu/store/lsqc0zjvqmnc8vbkk36g9jy5bcnmk455-profile.drv': 1 dependencies couldn't be built | guix package: error: build of `/gnu/store/lsqc0zjvqmnc8vbkk36g9jy5bcnmk455-profile.drv' failed | Exit code: 1 `---- When I try to read the log file, it is empty. ,---- | echo 'foo' | zcat /var/log/guix/drvs/a1/cxm06cdacqry9x0c14pnb4s491b6z9-my-simple-1-2.10.drv.gz | echo 'bar' `---- ,---- | foo | bar `---- 3 What I'm looking for ====================== 1. Why the package that I wrote failing? How could I fix it? 2. Do you know simpler package definitions (aka minimal working examples) that I could use for experimenting? (This is an example of [The XY problem], question 1 is X, question 2 is Y) [The XY problem] <https://xyproblem.info>
![https://www.gnu.org/graphics/heckert_gnu.transp.small.png"](https://www.gnu.org/graphics/heckert_gnu.transp.small.png"){kind=link}