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OCaml 5.4 Release: New Features, Fixes, and More!

An overview of the OCaml 5.4 update highlighting new features and bug fixes!

10 Oct 2025

Tarides

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Docker base image build rate

We are increasingly hitting the Docker Hub rate limits when pushing the Docker base images. This issue was previously identified in issue #267. However, this is now becoming critical as many more jobs are failing.

10 Oct 2025

Marc Elvers

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LexiFi at FUN OCaml 2025

FUN OCaml is an open-source hacking event dedicated to OCaml enthusiasts and professionals alike. The second edition took place this year on September 15 and 16 in Warsaw, Poland, and LexiFi took part in it!

09 Oct 2025

LexiFi blog

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Updating OCaml CI systems to FreeBSD 14.3

The FreeBSD CI worker rosemary needs to be updated to FreeBSD 14.3.

07 Oct 2025

Marc Elvers

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One year at Ahrefs

I started working at Ahrefs one year ago. When I applied I had heard of them from OCaml’s discuss amongst other OCaml community spaces and…

06 Oct 2025

Ahrefs

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Attempting overlayfs with macFuse

It would be great if overlayFS or unionFS worked on macOS! Initially, I attempted to use DYLD_INTERPOSE, but I wasn’t able to intercept enough system calls to get it to work. However, macFuse provides a way to implement our own userspace file systems. Patrick previously wrote obuilder-fs, which implemented a per-user filesystem redirection. It would be interesting to extend this concept to provide an overlayfs-style implementation.

06 Oct 2025

Marc Elvers

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Mental Check: Reflecting on the OCaml Journey So Far

A reflection on my OCaml web development journey so far.

05 Oct 2025

Chukwuma Akunyili

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Ocsigen: A Full OCaml Framework for Websites and Apps

Discover the OCaml web development framework Ocsigen, from its origins to its many helpful features!

02 Oct 2025

Tarides

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File descriptors as integers considered harmful

Continuing the previous foray into file descriptors, and trying to remove Obj.magic both from ocaml-uring’s code itself, and from the recommended way for using it.

01 Oct 2025

David Allsopp's Blog

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