Blog

The OCaml Planet RSS

Articles and videos contributed by both experts, companies and passionate developers from the OCaml community. From in-depth technical articles, project highlights, community news, or insights into Open Source projects, the OCaml Planet RSS feed aggregator has something for everyone.

Want your Blog Posts or Videos to Show Here?

To contribute a blog post, or add your RSS feed, check out the Contributing Guide on GitHub.

Using `day10` to build an OxCaml project

Today, looking at my OxCaml inference engine, I wanted to see whether day10 build . could build an OxCaml project.

30 Apr 2026

Marc Elvers

Read Article
Base Image Builder

The base image builder has a growing number of failed builds; it’s time to address these.

16 Jan 2026

Marc Elvers

Read Article
Label Maker in js_of_ocaml using Claude

I’ve taken a few days off, and while I’ve been travelling, I’ve been working on a personal project with Claude. I’ve used Claude Code for the first time, which is a much more powerful experience than using claude.ai as Claude can apply changes to the code and use your build tools directly to quickly iterate on a problem. In another first, I used js_of_ocaml, which has been awesome.

22 Aug 2025

Marc Elvers

Read Article
OCaml Functors

In my OCaml project, I’d like to abstract away the details of running containers into specific modules based on the OS. Currently, I have working container setups for Windows and Linux, and I’ve haphazardly peppered if Sys.win32 then where I need differentiation, but this is OCaml, so let us use functors!

01 Jul 2025

Marc Elvers

Read Article
Opam Health Check with OxCaml

Arthur mentioned that it would be great to know which packages build successfully with OxCaml and which don’t.

14 May 2025

Marc Elvers

Read Article
Posthog on OCaml.org

Sabine would like to switch OCaml.org from using Plausible over to Posthog. The underlying reason for the move is that the self-hosted product from Posthog has more features than the equivalent from Plausible. Of particular interest is the heatmap feature to assess the number of visitors who finish the Tour of OCaml.

12 May 2025

Marc Elvers

Read Article
Updating Docker and Go

For some time, we have had issues on Ubuntu Noble when extracting tar files within Docker containers. See ocaml/infrastructure#121. This is only an issue on exotic architectures like RISCV and PPC64LE.

01 Apr 2025

Marc Elvers

Read Article