diff --git a/Dockerfile b/Dockerfile
index d6a8eb4..bb0ba5d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,18 @@
 ## STAGE 1 // BUILD
 FROM code.foss.global/host.today/ht-docker-node:lts AS build
 
+# System build tools that the Rust dep tree needs beyond the base image:
+#   - cmake      : used by the `cmake` crate (transitive via ort_sys / a webrtc
+#                  sub-crate) to build a C/C++ library from source when a
+#                  prebuilt-binary download path doesn't apply.
+#   - pkg-config : used by audiopus_sys and other *-sys crates to locate libs
+#                  on the native target (safe no-op if they vendor their own).
+# These are normally pre-installed on dev machines but not in ht-docker-node:lts.
+RUN apt-get update && apt-get install -y --no-install-recommends \
+      cmake \
+      pkg-config \
+ && rm -rf /var/lib/apt/lists/*
+
 # buildx sets TARGETARCH automatically for each platform it's building:
 #   linux/amd64  -> TARGETARCH=amd64
 #   linux/arm64  -> TARGETARCH=arm64
diff --git a/changelog.md b/changelog.md
index 570f193..227a192 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 2026-04-11 - 1.20.1 - fix(docker)
+install required native build tools for Rust dependencies in the build image
+
+- Add cmake and pkg-config to the Docker build stage so Rust native dependencies can compile successfully in the container
+- Document why these tools are needed for transitive Rust crates that build or detect native libraries
+
 ## 2026-04-11 - 1.20.0 - feat(docker)
 add multi-arch Docker build and tagged release pipeline
 
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index aeff1af..dd80748 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: 'siprouter',
-  version: '1.20.0',
+  version: '1.20.1',
   description: 'undefined'
 }
diff --git a/ts_web/00_commitinfo_data.ts b/ts_web/00_commitinfo_data.ts
index aeff1af..dd80748 100644
--- a/ts_web/00_commitinfo_data.ts
+++ b/ts_web/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: 'siprouter',
-  version: '1.20.0',
+  version: '1.20.1',
   description: 'undefined'
 }