diff --git a/contrib/nnp-test/Dockerfile b/contrib/nnp-test/Dockerfile
index a33229ab85..f8da940c0b 100644
--- a/contrib/nnp-test/Dockerfile
+++ b/contrib/nnp-test/Dockerfile
@@ -1,4 +1,8 @@
-FROM debian:bookworm-slim
+# syntax=docker/dockerfile:1
+
+ARG BASE_DEBIAN_DISTRO=trixie
+
+FROM debian:${BASE_DEBIAN_DISTRO}-slim
 RUN apt-get update && apt-get install -y gcc libc6-dev --no-install-recommends
 
 COPY . /usr/src/
diff --git a/contrib/syscall-test/Dockerfile b/contrib/syscall-test/Dockerfile
index 7bcf4c7e37..dbab9ae25b 100644
--- a/contrib/syscall-test/Dockerfile
+++ b/contrib/syscall-test/Dockerfile
@@ -1,4 +1,8 @@
-FROM debian:bookworm-slim
+# syntax=docker/dockerfile:1
+
+ARG BASE_DEBIAN_DISTRO=trixie
+
+FROM debian:${BASE_DEBIAN_DISTRO}-slim
 RUN apt-get update && apt-get install -y gcc libc6-dev --no-install-recommends
 
 COPY . /usr/src/