diff --git a/debian13/Dockerfile b/debian13/Dockerfile
index 9899448..87066fa 100644
--- a/debian13/Dockerfile
+++ b/debian13/Dockerfile
@@ -21,19 +21,36 @@ RUN sed -i 's|deb.debian.org|mirrors.ustc.edu.cn|g' /etc/apt/sources.list.d/debi
         aria2 \
     && rm -rf /var/lib/apt/lists/*
 
+# Install prefix of every dependency, and the Debian multiarch directory name (`gcc -dumpmachine`)
+# its libraries are installed under; build.sh derives the latter from `uname -m`.
+ARG PREFIX=/usr/local
+ARG MULTIARCH=x86_64-linux-gnu
+
+# Make the compiler, CMake, pkg-config and the shell find earlier dependencies under a prefix other
+# than the default /usr/local. CMake (>= 3.29) takes its default install prefix from the environment.
+ENV PATH=${PREFIX}/bin:${PATH} \
+    C_INCLUDE_PATH=${PREFIX}/include \
+    CPLUS_INCLUDE_PATH=${PREFIX}/include \
+    LIBRARY_PATH=${PREFIX}/lib/${MULTIARCH}:${PREFIX}/lib \
+    PKG_CONFIG_PATH=${PREFIX}/lib/${MULTIARCH}/pkgconfig:${PREFIX}/lib/pkgconfig:${PREFIX}/share/pkgconfig \
+    CMAKE_PREFIX_PATH=${PREFIX} \
+    CMAKE_INSTALL_PREFIX=${PREFIX}
+
+RUN test "$(cmake --version | sed -n '1s/[^0-9]*//p' | cut -d. -f2)" -ge 29
+
 RUN git config --global url."https://wangguofang.net/github.com/".insteadOf "https://github.com/"
 
 RUN --mount=type=bind,from=sources,source=rust,target=/tmp/rust \
     mkdir rust-src \
     && tar -xJf "/tmp/rust/rust-1.99.1-$(uname -m)-unknown-linux-gnu.tar.xz" -C rust-src --strip-components=1 \
-    && rust-src/install.sh --prefix=/usr/local --without=rust-docs \
+    && rust-src/install.sh --prefix=${PREFIX} --without=rust-docs \
     && rm -rf rust-src
 
 RUN --mount=type=bind,from=sources,source=boost_1_83_0.tar.bz2,target=/tmp/boost.tar.bz2 \
     mkdir src \
     && tar --extract --bzip2 --file=/tmp/boost.tar.bz2 --directory=src --strip-components=1 \
     && cd src \
-    && ./bootstrap.sh --prefix=/usr/local --libdir=/usr/local/lib/$(gcc -dumpmachine) \
+    && ./bootstrap.sh --prefix=${PREFIX} --libdir=${PREFIX}/lib/$(gcc -dumpmachine) \
     && ./b2 --jobs="$(nproc)" \
         --with-atomic \
         --with-chrono \
@@ -59,7 +76,7 @@ RUN --mount=type=bind,from=sources,source=openssl-openssl-3.0.15.tar.gz,target=/
     mkdir src \
     && tar --extract --gzip --file=/tmp/openssl.tar.gz --directory=src --strip-components=1 \
     && cd src \
-    && ./Configure --prefix=/usr/local --libdir=lib/$(gcc -dumpmachine) no-shared no-tests -fPIC \
+    && ./Configure --prefix=${PREFIX} --libdir=lib/$(gcc -dumpmachine) no-shared no-tests -fPIC \
     && make --jobs="$(nproc)" \
     && make install_sw \
     && cd .. \
@@ -99,7 +116,7 @@ RUN --mount=type=bind,from=sources,source=zlib-v1.3.1.tar.gz,target=/tmp/zlib.ta
     mkdir src \
     && tar --extract --gzip --file=/tmp/zlib.tar.gz --directory=src --strip-components=1 \
     && cd src \
-    && CFLAGS=-fPIC ./configure --prefix=/usr/local --libdir=/usr/local/lib/$(gcc -dumpmachine) --static \
+    && CFLAGS=-fPIC ./configure --prefix=${PREFIX} --libdir=${PREFIX}/lib/$(gcc -dumpmachine) --static \
     && make --jobs="$(nproc)" \
     && make install \
     && cd .. \
@@ -199,7 +216,7 @@ RUN --mount=type=bind,from=sources,source=gflags-v2.3.1.tar.gz,target=/tmp/gflag
         -DINSTALL_HEADERS=ON \
         -DINSTALL_SHARED_LIBS=OFF \
         -DINSTALL_STATIC_LIBS=ON \
-        -DLIBRARY_INSTALL_DIR=/usr/local/lib/$(gcc -dumpmachine) \
+        -DLIBRARY_INSTALL_DIR=${PREFIX}/lib/$(gcc -dumpmachine) \
         -DREGISTER_INSTALL_PREFIX=OFF \
     && cmake --build build --parallel "$(nproc)" --target install \
     && rm -rf build src
@@ -223,7 +240,7 @@ RUN --mount=type=bind,from=sources,source=liburing-liburing-2.15.tar.gz,target=/
     mkdir src \
     && tar --extract --gzip --file=/tmp/liburing.tar.gz --directory=src --strip-components=1 \
     && cd src \
-    && CFLAGS=-fPIC ./configure --prefix=/usr/local --libdir=/usr/local/lib/$(gcc -dumpmachine) --libdevdir=/usr/local/lib/$(gcc -dumpmachine) \
+    && CFLAGS=-fPIC ./configure --prefix=${PREFIX} --libdir=${PREFIX}/lib/$(gcc -dumpmachine) --libdevdir=${PREFIX}/lib/$(gcc -dumpmachine) \
     && make --jobs="$(nproc)" ENABLE_SHARED=0 library \
     && make ENABLE_SHARED=0 install \
     && cd .. \
@@ -233,7 +250,7 @@ RUN --mount=type=bind,from=sources,source=libaio_0.3.113.orig.tar.gz,target=/tmp
     mkdir src \
     && tar --extract --gzip --file=/tmp/libaio.tar.gz --directory=src --strip-components=1 \
     && make --directory=src --jobs="$(nproc)" ENABLE_SHARED=0 \
-    && make --directory=src ENABLE_SHARED=0 prefix=/usr/local libdir=/usr/local/lib/$(gcc -dumpmachine) install \
+    && make --directory=src ENABLE_SHARED=0 prefix=${PREFIX} libdir=${PREFIX}/lib/$(gcc -dumpmachine) install \
     && rm -rf src
 
 RUN --mount=type=bind,from=sources,source=libdwarf-code-v2.3.2.tar.gz,target=/tmp/libdwarf-code.tar.gz \
@@ -257,7 +274,7 @@ RUN --mount=type=bind,from=sources,source=libsodium-1.0.20-RELEASE.tar.gz,target
     && tar --extract --gzip --file=/tmp/libsodium.tar.gz --directory=src --strip-components=1 \
     && cd src \
     && ./autogen.sh \
-    && ./configure --prefix=/usr/local --libdir=/usr/local/lib/$(gcc -dumpmachine) --disable-shared --enable-static --with-pic \
+    && ./configure --prefix=${PREFIX} --libdir=${PREFIX}/lib/$(gcc -dumpmachine) --disable-shared --enable-static --with-pic \
     && make --jobs="$(nproc)" \
     && make install \
     && cd .. \
@@ -293,7 +310,7 @@ RUN --mount=type=bind,from=sources,source=numactl-v2.0.19.tar.gz,target=/tmp/num
     && tar --extract --gzip --file=/tmp/numactl.tar.gz --directory=src --strip-components=1 \
     && cd src \
     && ./autogen.sh \
-    && CFLAGS=-fPIC ./configure --prefix=/usr/local --libdir=/usr/local/lib/$(gcc -dumpmachine) --disable-shared --enable-static \
+    && CFLAGS=-fPIC ./configure --prefix=${PREFIX} --libdir=${PREFIX}/lib/$(gcc -dumpmachine) --disable-shared --enable-static \
     && make --jobs="$(nproc)" \
     && make install \
     && cd .. \
@@ -393,7 +410,7 @@ RUN --mount=type=bind,from=sources,source=util-linux-2.42.2.tar.xz,target=/tmp/u
     mkdir src \
     && tar --extract --xz --file=/tmp/util-linux.tar.xz --directory=src --strip-components=1 \
     && cd src \
-    && CFLAGS=-fPIC ./configure --prefix=/usr/local --libdir=/usr/local/lib/$(gcc -dumpmachine) \
+    && CFLAGS=-fPIC ./configure --prefix=${PREFIX} --libdir=${PREFIX}/lib/$(gcc -dumpmachine) \
         --disable-all-programs \
         --disable-bash-completion \
         --disable-makeinstall-chown \
@@ -497,7 +514,7 @@ RUN --mount=type=bind,from=sources,source=rapidjson-v1.1.0.tar.gz,target=/tmp/ra
     && tar --extract --gzip --file=/tmp/rapidjson.tar.gz --directory=src --strip-components=1 \
     && git -C src apply /tmp/rapidjson-generic-string-ref-assignment.patch \
     && cmake -G Ninja -S src -B build -DCMAKE_BUILD_TYPE=Release \
-        -DLIB_INSTALL_DIR=/usr/local/lib/$(gcc -dumpmachine) \
+        -DLIB_INSTALL_DIR=${PREFIX}/lib/$(gcc -dumpmachine) \
         -DRAPIDJSON_BUILD_DOC=OFF \
         -DRAPIDJSON_BUILD_EXAMPLES=OFF \
         -DRAPIDJSON_BUILD_TESTS=OFF \
@@ -550,7 +567,7 @@ RUN --mount=type=bind,from=sources,source=gmp-6.3.0.tar.xz,target=/tmp/gmp.tar.x
     mkdir src \
     && tar --extract --xz --file=/tmp/gmp.tar.xz --directory=src --strip-components=1 \
     && cd src \
-    && CFLAGS=-fPIC ./configure --prefix=/usr/local --libdir=/usr/local/lib/$(gcc -dumpmachine) --disable-shared --enable-static \
+    && CFLAGS=-fPIC ./configure --prefix=${PREFIX} --libdir=${PREFIX}/lib/$(gcc -dumpmachine) --disable-shared --enable-static \
     && make --jobs="$(nproc)" \
     && make install \
     && cd .. \
@@ -560,7 +577,7 @@ RUN --mount=type=bind,from=sources,source=nettle-3.10.2.tar.gz,target=/tmp/nettl
     mkdir src \
     && tar --extract --gzip --file=/tmp/nettle.tar.gz --directory=src --strip-components=1 \
     && cd src \
-    && CFLAGS=-fPIC ./configure --prefix=/usr/local --libdir=/usr/local/lib/$(gcc -dumpmachine) \
+    && CFLAGS=-fPIC ./configure --prefix=${PREFIX} --libdir=${PREFIX}/lib/$(gcc -dumpmachine) \
         --disable-documentation \
         --disable-shared \
         --enable-static \
@@ -573,7 +590,7 @@ RUN --mount=type=bind,from=sources,source=gnutls-3.8.13.tar.xz,target=/tmp/gnutl
     mkdir src \
     && tar --extract --xz --file=/tmp/gnutls.tar.xz --directory=src --strip-components=1 \
     && cd src \
-    && CFLAGS=-fPIC ./configure --prefix=/usr/local --libdir=/usr/local/lib/$(gcc -dumpmachine) \
+    && CFLAGS=-fPIC ./configure --prefix=${PREFIX} --libdir=${PREFIX}/lib/$(gcc -dumpmachine) \
         --with-included-libtasn1 \
         --with-included-unistring \
         --disable-cxx \
@@ -613,7 +630,7 @@ RUN --mount=type=bind,from=sources,source=libyaml-0.2.5.tar.gz,target=/tmp/libya
     && tar --extract --gzip --file=/tmp/libyaml.tar.gz --directory=src --strip-components=1 \
     && cd src \
     && ./bootstrap \
-    && CFLAGS=-fPIC ./configure --prefix=/usr/local --libdir=/usr/local/lib/$(gcc -dumpmachine) --disable-shared --enable-static \
+    && CFLAGS=-fPIC ./configure --prefix=${PREFIX} --libdir=${PREFIX}/lib/$(gcc -dumpmachine) --disable-shared --enable-static \
     && make --jobs="$(nproc)" \
     && make install \
     && cd .. \
@@ -653,7 +670,7 @@ RUN --mount=type=bind,from=sources,source=libunwind-v1.8.3.tar.gz,target=/tmp/li
     && tar --extract --gzip --file=/tmp/libunwind.tar.gz --directory=src --strip-components=1 \
     && cd src \
     && autoreconf --install \
-    && CFLAGS=-fPIC ./configure --prefix=/usr/local --libdir=/usr/local/lib/$(gcc -dumpmachine) \
+    && CFLAGS=-fPIC ./configure --prefix=${PREFIX} --libdir=${PREFIX}/lib/$(gcc -dumpmachine) \
         --disable-shared \
         --enable-static \
         --disable-tests \
@@ -670,7 +687,7 @@ RUN --mount=type=bind,from=sources,source=jemalloc-5.3.1.tar.gz,target=/tmp/jema
     && tar --extract --gzip --file=/tmp/jemalloc.tar.gz --directory=src --strip-components=1 \
     && cd src \
     && ./autogen.sh \
-    && CFLAGS=-fPIC CXXFLAGS=-fPIC ./configure --prefix=/usr/local --libdir=/usr/local/lib/$(gcc -dumpmachine) \
+    && CFLAGS=-fPIC CXXFLAGS=-fPIC ./configure --prefix=${PREFIX} --libdir=${PREFIX}/lib/$(gcc -dumpmachine) \
         --disable-doc \
         --disable-shared \
         --enable-static \
@@ -685,8 +702,8 @@ RUN --mount=type=bind,from=sources,source=libproxyprotocol-v1.3.3.tar.gz,target=
     mkdir src \
     && tar --extract --gzip --file=/tmp/libproxyprotocol.tar.gz --directory=src --strip-components=1 \
     && gcc -fPIC -c -o src/src/proxy_protocol.o src/src/proxy_protocol.c \
-    && ar rcs /usr/local/lib/$(gcc -dumpmachine)/libproxyprotocol.a src/src/proxy_protocol.o \
-    && cp src/src/proxy_protocol.h /usr/local/include/ \
+    && ar rcs ${PREFIX}/lib/$(gcc -dumpmachine)/libproxyprotocol.a src/src/proxy_protocol.o \
+    && cp src/src/proxy_protocol.h ${PREFIX}/include/ \
     && rm -rf src
 
 RUN --mount=type=bind,from=sources,source=xsimd-14.2.0.tar.gz,target=/tmp/xsimd.tar.gz \
@@ -706,10 +723,10 @@ RUN --mount=type=bind,from=sources,source=thrift-v0.22.0.tar.gz,target=/tmp/thri
         -DBUILD_SHARED_LIBS=OFF \
         -DBUILD_TESTING=OFF \
         -DBUILD_TUTORIALS=OFF \
-        -DCMAKE_INSTALL_DIR=/usr/local/lib/$(gcc -dumpmachine)/cmake \
+        -DCMAKE_INSTALL_DIR=${PREFIX}/lib/$(gcc -dumpmachine)/cmake \
         -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
-        -DLIB_INSTALL_DIR=/usr/local/lib/$(gcc -dumpmachine) \
-        -DPKGCONFIG_INSTALL_DIR=/usr/local/lib/$(gcc -dumpmachine)/pkgconfig \
+        -DLIB_INSTALL_DIR=${PREFIX}/lib/$(gcc -dumpmachine) \
+        -DPKGCONFIG_INSTALL_DIR=${PREFIX}/lib/$(gcc -dumpmachine)/pkgconfig \
         -DWITH_AS3=OFF \
         -DWITH_C_GLIB=OFF \
         -DWITH_CPP=ON \
@@ -723,7 +740,7 @@ RUN --mount=type=bind,from=sources,source=thrift-v0.22.0.tar.gz,target=/tmp/thri
         -DWITH_ZLIB=OFF \
     && cmake --build build --parallel "$(nproc)" --target install \
     && sed -i 's|^libdir=.*|libdir=${prefix}/lib/'"$(gcc -dumpmachine)"'|' \
-        /usr/local/lib/$(gcc -dumpmachine)/pkgconfig/thrift.pc \
+        ${PREFIX}/lib/$(gcc -dumpmachine)/pkgconfig/thrift.pc \
     && rm -rf build src
 
 RUN --mount=type=bind,from=sources,source=snappy-1.2.2.tar.gz,target=/tmp/snappy.tar.gz \
diff --git a/debian13/build.sh b/debian13/build.sh
index ee96fd4..7f0e6bb 100755
--- a/debian13/build.sh
+++ b/debian13/build.sh
@@ -3,6 +3,7 @@
 set -eu
 
 IMAGE_NAME="${IMAGE_NAME:-debian13-source-stack}"
+PREFIX="${PREFIX:-/usr/local}"
 SCRIPT_DIR=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
 SOURCES_DIR="${SOURCES_DIR:-$SCRIPT_DIR/../sources}"
 FETCH_SCRIPT="$SCRIPT_DIR/../fetch-sources.sh"
@@ -14,5 +15,7 @@ fi
 
 SOURCES_DIR="$SOURCES_DIR" "$FETCH_SCRIPT"
 
-echo "Building image $IMAGE_NAME with podman ..."
-exec podman build --build-context sources="$SOURCES_DIR" --tag "$IMAGE_NAME" "$SCRIPT_DIR"
+echo "Building image $IMAGE_NAME with podman (prefix $PREFIX) ..."
+exec podman build --build-context sources="$SOURCES_DIR" \
+    --build-arg PREFIX="$PREFIX" --build-arg MULTIARCH="$(uname -m)-linux-gnu" \
+    --tag "$IMAGE_NAME" "$SCRIPT_DIR"