diff --git a/agent/Dockerfile.build b/agent/Dockerfile.build
index 3dbbb6c..4bed0b0 100644
--- a/agent/Dockerfile.build
+++ b/agent/Dockerfile.build
@@ -10,10 +10,12 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
       build-essential git ca-certificates curl xz-utils unzip 7zip \
     && rm -rf /var/lib/apt/lists/*
 
-# Zig (Burrito needs it for cross-compile)
-ARG ZIG_VERSION=0.13.0
-RUN curl -fsSL https://ziglang.org/download/${ZIG_VERSION}/zig-linux-$(uname -m)-${ZIG_VERSION}.tar.xz \
-    | tar -xJ -C /opt && ln -s /opt/zig-linux-*/zig /usr/local/bin/zig
+# Zig (Burrito needs it for cross-compile).
+# Zig 0.15.x flipped the tarball naming from zig-linux-ARCH- to zig-ARCH-linux-;
+# keep the URL pattern in sync if you bump the version.
+ARG ZIG_VERSION=0.15.2
+RUN curl -fsSL https://ziglang.org/download/${ZIG_VERSION}/zig-$(uname -m)-linux-${ZIG_VERSION}.tar.xz \
+    | tar -xJ -C /opt && ln -s /opt/zig-*-linux-*/zig /usr/local/bin/zig
 
 WORKDIR /work/agent
 RUN mix local.hex --force && mix local.rebar --force
diff --git a/docs/superpowers/plans/2026-04-22-phase4-packaging-und-deployment.md b/docs/superpowers/plans/2026-04-22-phase4-packaging-und-deployment.md
index 711b3d9..53d9ec8 100644
--- a/docs/superpowers/plans/2026-04-22-phase4-packaging-und-deployment.md
+++ b/docs/superpowers/plans/2026-04-22-phase4-packaging-und-deployment.md
@@ -231,10 +231,12 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
       build-essential git ca-certificates curl xz-utils unzip 7zip \
     && rm -rf /var/lib/apt/lists/*
 
-# Zig (Burrito needs it for cross-compile)
-ARG ZIG_VERSION=0.13.0
-RUN curl -fsSL https://ziglang.org/download/${ZIG_VERSION}/zig-linux-$(uname -m)-${ZIG_VERSION}.tar.xz \
-    | tar -xJ -C /opt && ln -s /opt/zig-linux-*/zig /usr/local/bin/zig
+# Zig (Burrito needs it for cross-compile).
+# Zig 0.15.x flipped the tarball naming from zig-linux-ARCH- to zig-ARCH-linux-;
+# keep the URL pattern in sync if you bump the version.
+ARG ZIG_VERSION=0.15.2
+RUN curl -fsSL https://ziglang.org/download/${ZIG_VERSION}/zig-$(uname -m)-linux-${ZIG_VERSION}.tar.xz \
+    | tar -xJ -C /opt && ln -s /opt/zig-*-linux-*/zig /usr/local/bin/zig
 
 WORKDIR /work/agent
 RUN mix local.hex --force && mix local.rebar --force