diff --git a/docs/training-events/2025/EESSI-happyhour-2025-011-Using-buildenv-modules.pdf b/docs/training-events/2025/EESSI-happyhour-2025-011-Using-buildenv-modules.pdf
new file mode 100644
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Binary files /dev/null and b/docs/training-events/2025/EESSI-happyhour-2025-011-Using-buildenv-modules.pdf differ
diff --git a/docs/training-events/2025/happy-hours-previous-sessions.md b/docs/training-events/2025/happy-hours-previous-sessions.md
index 69c19a0256..3a8f422288 100644
--- a/docs/training-events/2025/happy-hours-previous-sessions.md
+++ b/docs/training-events/2025/happy-hours-previous-sessions.md
@@ -6,6 +6,13 @@ Find slides, and video recordings of earlier sessions below.
 
 # Topic series: Building on top of EESSI
 
+### Monday 27 October 2025
+
+**Outline:** Building on top of EESSI using `buildenv` modules
+([Slides (PDF)](EESSI-happyhour-2025-011-Using-buildenv-modules.pdf), [Recording (YouTube)](https://youtu.be/0uwUlM1xqNk))
+
+<iframe width="560" height="315" src="https://www.youtube.com/embed/0uwUlM1xqNk?si=Ip7SqiUizhZxPfG_" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+
 ### Monday 20 October 2025
 
 **Outline:** How we build software in EESSI
@@ -13,7 +20,6 @@ Find slides, and video recordings of earlier sessions below.
 
 <iframe width="560" height="315" src="https://www.youtube.com/embed/KkD6vtPqqMs?si=b-JeESSfzwgZLvUb" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
 
-
 ### Monday 13 October 2025
 
 **Outline:** Using EasyBuild and controlling settings via `EESSI-extend`
diff --git a/docs/training-events/2025/happy-hours-sessions.md b/docs/training-events/2025/happy-hours-sessions.md
index beafd69745..411e4ca3c7 100644
--- a/docs/training-events/2025/happy-hours-sessions.md
+++ b/docs/training-events/2025/happy-hours-sessions.md
@@ -31,16 +31,15 @@ If you haven't joined the EESSI Slack yet, [click here to join](https://join.sla
 
 ---
 
-### 💡 **Next Session**: Building on top of EESSI using `buildenv` modules
+### 💡 **Next Session**: Contributing software packages to EESSI
 ### Topic Series: Building on top of EESSI
 🗓️ Schedule
-#### Monday 20 October 2025, 14:00-15:00 CE(S)T
+#### Monday 03 November 2025, 14:00-15:00 CE(S)T
 
 ---
 
 ### Upcoming sessions in the topic series: Building on top of EESSI
 ###### Outline
-- 27 October 2025 - Building on top of EESSI using `buildenv` modules
 - 03 November 2025 - Contributing software packages to EESSI
 
 ---
@@ -53,6 +52,8 @@ See the full Recordings, slides, and materials here: [Previous Sessions & Videos
 
 *Topic series: Building on top of EESSI*
 
+- 27 October 2025 [Building on top of EESSI using `buildenv` modules](https://youtu.be/0uwUlM1xqNk)
+
 - 20 October 2025 [How we build software in EESSI](https://www.youtube.com/watch?v=KkD6vtPqqMs)
 
 - 13 October 2025 [Using EasyBuild and controlling settings via `EESSI-extend`](https://www.youtube.com/watch?v=X54J-kbjwDQ)