Document OpenBSD

Mentioned myself as the maintainer for now, though I don't know how active
I'll be

1 files changed, 42 insertions, 0 deletions

diff --git a/builds.sr.ht/compatibility.md b/builds.sr.ht/compatibility.md
index d1b2f20..afae012 100644
--- a/builds.sr.ht/compatibility.md
+++ b/builds.sr.ht/compatibility.md
@@ -594,6 +594,48 @@ since `repo-name: repo-url` will execute the commands `nix-channel --add
 repo-url repo-name` and `nix-channel --update repo-name`. Given the nature of
 nix, no channels are added by default.
 
+## OpenBSD
+
+Maintainer: Jarkko Oranen <oranenj@iki.fi>
+
+<table class="table table-sm table-hover">
+  <thead>
+    <tr>
+      <th>OpenBSD 6.5</th>
+      <th colspan="3" style="font-weight: normal; text-align: center">
+        <code>image: openbsd/6.5</code>
+      </th>
+    </tr>
+    <tr>
+      <th>arch</th>
+      <th style="text-align: center">supported</th>
+      <th style="text-align: center">native</th>
+      <th>updated</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr class="table-primary">
+      <td><code>arch: amd64</code> (default)</td>
+      <td style="text-align: center; color: green">✓</td>
+      <td style="text-align: center; color: green">✓</td>
+      <td>as required</td>
+    </tr>
+  </tbody>
+</table>
+
+**notes**
+
+Currently, the image corresponds to OpenBSD 6.5 as it was initially
+released, not the -stable branch with errata applied.
+
+**packages**
+
+The packages array is installed with `pkg_add`.
+
+**repositories**
+
+Custom package repositories are not supported on OpenBSD builds.
+
 ## Ubuntu
 
 Maintainer: New maintainer wanted