diff --git a/src/ci/docker/host-aarch64/dist-aarch64-linux/Dockerfile b/src/ci/docker/host-aarch64/dist-aarch64-linux/Dockerfile
new file mode 100644
index 0000000000000..4f4caa5fa50cf
--- /dev/null
+++ b/src/ci/docker/host-aarch64/dist-aarch64-linux/Dockerfile
@@ -0,0 +1,99 @@
+# We document platform support for minimum glibc 2.17 and kernel 3.2.
+# CentOS 7 has headers for kernel 3.10, but that's fine as long as we don't
+# actually use newer APIs in rustc or std without a fallback. It's more
+# important that we match glibc for ELF symbol versioning.
+FROM centos:7
+
+WORKDIR /build
+
+# CentOS 7 EOL is June 30, 2024, but the repos remain in the vault.
+RUN sed -i /etc/yum.repos.d/*.repo -e 's!^mirrorlist!#mirrorlist!' \
+  -e 's!^#baseurl=http://mirror.centos.org/!baseurl=https://vault.centos.org/!'
+RUN sed -i 's/enabled=1/enabled=0/' /etc/yum/pluginconf.d/fastestmirror.conf
+
+RUN yum upgrade -y && \
+    yum install -y \
+      automake \
+      bzip2 \
+      file \
+      gcc \
+      gcc-c++ \
+      git \
+      glibc-devel \
+      libedit-devel \
+      libstdc++-devel \
+      make \
+      ncurses-devel \
+      openssl-devel \
+      patch \
+      perl \
+      perl-core \
+      pkgconfig \
+      python3 \
+      unzip \
+      wget \
+      xz \
+      zlib-devel \
+      && yum clean all
+
+RUN mkdir -p /rustroot/bin
+
+ENV PATH=/rustroot/bin:$PATH
+ENV LD_LIBRARY_PATH=/rustroot/lib64:/rustroot/lib32:/rustroot/lib
+ENV PKG_CONFIG_PATH=/rustroot/lib/pkgconfig
+WORKDIR /tmp
+RUN mkdir /home/user
+COPY scripts/shared.sh /tmp/
+
+# Need at least GCC 5.1 to compile LLVM
+COPY scripts/build-gcc.sh /tmp/
+RUN ./build-gcc.sh && yum remove -y gcc gcc-c++
+
+ENV CC=gcc CXX=g++
+
+# LLVM 17 needs cmake 3.20 or higher.
+COPY scripts/cmake.sh /tmp/
+RUN ./cmake.sh
+
+# Build LLVM+Clang
+COPY scripts/build-clang.sh /tmp/
+ENV LLVM_BUILD_TARGETS=AArch64
+RUN ./build-clang.sh
+ENV CC=clang CXX=clang++
+
+# Build zstd to enable `llvm.libzstd`.
+COPY scripts/build-zstd.sh /tmp/
+RUN ./build-zstd.sh
+
+COPY scripts/sccache.sh /scripts/
+RUN sh /scripts/sccache.sh
+
+ENV PGO_HOST=aarch64-unknown-linux-gnu
+ENV HOSTS=aarch64-unknown-linux-gnu
+
+ENV CPATH=/usr/include/aarch64-linux-gnu/:$CPATH
+
+ENV RUST_CONFIGURE_ARGS \
+      --build=aarch64-unknown-linux-gnu \
+      --enable-full-tools \
+      --enable-profiler \
+      --enable-sanitizers \
+      --enable-compiler-docs \
+      --set target.aarch64-unknown-linux-gnu.linker=clang \
+      --set target.aarch64-unknown-linux-gnu.ar=/rustroot/bin/llvm-ar \
+      --set target.aarch64-unknown-linux-gnu.ranlib=/rustroot/bin/llvm-ranlib \
+      --set llvm.link-shared=true \
+      --set llvm.thin-lto=true \
+      --set llvm.libzstd=true \
+      --set llvm.ninja=false \
+      --set rust.debug-assertions=false \
+      --set rust.jemalloc \
+      --set rust.use-lld=true \
+      --set rust.codegen-units=1
+
+ENV SCRIPT python3 ../x.py dist --host $HOSTS --target $HOSTS
+
+ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=clang
+ENV DIST_SRC 1
+ENV LIBCURL_NO_PKG_CONFIG 1
+ENV DIST_REQUIRE_ALL_TOOLS 1
diff --git a/src/ci/docker/host-x86_64/dist-aarch64-linux/Dockerfile b/src/ci/docker/host-x86_64/dist-aarch64-linux/Dockerfile
deleted file mode 100644
index 18972387e34d7..0000000000000
--- a/src/ci/docker/host-x86_64/dist-aarch64-linux/Dockerfile
+++ /dev/null
@@ -1,32 +0,0 @@
-FROM ubuntu:22.04
-
-COPY scripts/cross-apt-packages.sh /scripts/
-RUN sh /scripts/cross-apt-packages.sh
-
-COPY scripts/crosstool-ng.sh /scripts/
-RUN sh /scripts/crosstool-ng.sh
-
-COPY scripts/rustbuild-setup.sh /scripts/
-RUN sh /scripts/rustbuild-setup.sh
-WORKDIR /tmp
-
-COPY scripts/crosstool-ng-build.sh /scripts/
-COPY host-x86_64/dist-aarch64-linux/aarch64-linux-gnu.defconfig /tmp/crosstool.defconfig
-RUN /scripts/crosstool-ng-build.sh
-
-COPY scripts/sccache.sh /scripts/
-RUN sh /scripts/sccache.sh
-
-ENV PATH=$PATH:/x-tools/aarch64-unknown-linux-gnu/bin
-
-ENV CC_aarch64_unknown_linux_gnu=aarch64-unknown-linux-gnu-gcc \
-    AR_aarch64_unknown_linux_gnu=aarch64-unknown-linux-gnu-ar \
-    CXX_aarch64_unknown_linux_gnu=aarch64-unknown-linux-gnu-g++
-
-ENV HOSTS=aarch64-unknown-linux-gnu
-
-ENV RUST_CONFIGURE_ARGS \
-      --enable-full-tools \
-      --enable-profiler \
-      --enable-sanitizers
-ENV SCRIPT python3 ../x.py dist --host $HOSTS --target $HOSTS
diff --git a/src/ci/docker/host-x86_64/dist-aarch64-linux/aarch64-linux-gnu.defconfig b/src/ci/docker/host-x86_64/dist-aarch64-linux/aarch64-linux-gnu.defconfig
deleted file mode 100644
index 520b1667c8be1..0000000000000
--- a/src/ci/docker/host-x86_64/dist-aarch64-linux/aarch64-linux-gnu.defconfig
+++ /dev/null
@@ -1,10 +0,0 @@
-CT_CONFIG_VERSION="4"
-CT_PREFIX_DIR="/x-tools/${CT_TARGET}"
-CT_USE_MIRROR=y
-CT_MIRROR_BASE_URL="https://ci-mirrors.rust-lang.org/rustc"
-CT_ARCH_ARM=y
-CT_ARCH_64=y
-CT_KERNEL_LINUX=y
-CT_LINUX_V_4_1=y
-CT_GLIBC_V_2_17=y
-CT_CC_LANG_CXX=y
diff --git a/src/ci/docker/host-x86_64/dist-i686-linux/Dockerfile b/src/ci/docker/host-x86_64/dist-i686-linux/Dockerfile
index 414bcc52484c9..7cf1c80dfbc65 100644
--- a/src/ci/docker/host-x86_64/dist-i686-linux/Dockerfile
+++ b/src/ci/docker/host-x86_64/dist-i686-linux/Dockerfile
@@ -46,10 +46,11 @@ ENV LD_LIBRARY_PATH=/rustroot/lib64:/rustroot/lib32:/rustroot/lib
 ENV PKG_CONFIG_PATH=/rustroot/lib/pkgconfig
 WORKDIR /tmp
 RUN mkdir /home/user
-COPY host-x86_64/dist-x86_64-linux/shared.sh /tmp/
+COPY scripts/shared.sh /tmp/
 
 # Need at least GCC 5.1 to compile LLVM nowadays
-COPY host-x86_64/dist-x86_64-linux/build-gcc.sh /tmp/
+COPY scripts/build-gcc.sh /tmp/
+ENV GCC_BUILD_TARGET=i686
 RUN ./build-gcc.sh && yum remove -y gcc gcc-c++
 
 COPY scripts/cmake.sh /tmp/
@@ -57,7 +58,8 @@ RUN ./cmake.sh
 
 # Now build LLVM+Clang, afterwards configuring further compilations to use the
 # clang/clang++ compilers.
-COPY host-x86_64/dist-x86_64-linux/build-clang.sh /tmp/
+COPY scripts/build-clang.sh /tmp/
+ENV LLVM_BUILD_TARGETS=X86
 RUN ./build-clang.sh
 ENV CC=clang CXX=clang++
 
diff --git a/src/ci/docker/host-x86_64/dist-powerpc64le-linux/Dockerfile b/src/ci/docker/host-x86_64/dist-powerpc64le-linux/Dockerfile
index 9ef391892497f..9d3be51d037d1 100644
--- a/src/ci/docker/host-x86_64/dist-powerpc64le-linux/Dockerfile
+++ b/src/ci/docker/host-x86_64/dist-powerpc64le-linux/Dockerfile
@@ -18,7 +18,7 @@ RUN /scripts/crosstool-ng-build.sh
 WORKDIR /build
 
 RUN apt-get install -y --no-install-recommends rpm2cpio cpio
-COPY host-x86_64/dist-powerpc64le-linux/shared.sh host-x86_64/dist-powerpc64le-linux/build-powerpc64le-toolchain.sh /build/
+COPY scripts/shared.sh host-x86_64/dist-powerpc64le-linux/build-powerpc64le-toolchain.sh /build/
 RUN ./build-powerpc64le-toolchain.sh
 
 COPY scripts/sccache.sh /scripts/
diff --git a/src/ci/docker/host-x86_64/dist-powerpc64le-linux/shared.sh b/src/ci/docker/host-x86_64/dist-powerpc64le-linux/shared.sh
deleted file mode 100644
index dc86dddd464f2..0000000000000
--- a/src/ci/docker/host-x86_64/dist-powerpc64le-linux/shared.sh
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/sh
-hide_output() {
-  set +x
-  on_err="
-echo ERROR: An error was encountered with the build.
-cat /tmp/build.log
-exit 1
-"
-  trap "$on_err" ERR
-  bash -c "while true; do sleep 30; echo \$(date) - building ...; done" &
-  PING_LOOP_PID=$!
-  "$@" &> /tmp/build.log
-  trap - ERR
-  kill $PING_LOOP_PID
-  set -x
-}
diff --git a/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile b/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile
index e857f38e68a85..c13c340871c9a 100644
--- a/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile
+++ b/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile
@@ -46,10 +46,10 @@ ENV LD_LIBRARY_PATH=/rustroot/lib64:/rustroot/lib32:/rustroot/lib
 ENV PKG_CONFIG_PATH=/rustroot/lib/pkgconfig
 WORKDIR /tmp
 RUN mkdir /home/user
-COPY host-x86_64/dist-x86_64-linux/shared.sh /tmp/
+COPY scripts/shared.sh /tmp/
 
 # Need at least GCC 5.1 to compile LLVM nowadays
-COPY host-x86_64/dist-x86_64-linux/build-gcc.sh /tmp/
+COPY scripts/build-gcc.sh /tmp/
 RUN ./build-gcc.sh && yum remove -y gcc gcc-c++
 
 # LLVM 17 needs cmake 3.20 or higher.
@@ -58,12 +58,13 @@ RUN ./cmake.sh
 
 # Now build LLVM+Clang, afterwards configuring further compilations to use the
 # clang/clang++ compilers.
-COPY host-x86_64/dist-x86_64-linux/build-clang.sh /tmp/
+COPY scripts/build-clang.sh /tmp/
+ENV LLVM_BUILD_TARGETS=X86
 RUN ./build-clang.sh
 ENV CC=clang CXX=clang++
 
 # Build zstd to enable `llvm.libzstd`.
-COPY host-x86_64/dist-x86_64-linux/build-zstd.sh /tmp/
+COPY scripts/build-zstd.sh /tmp/
 RUN ./build-zstd.sh
 
 COPY scripts/sccache.sh /scripts/
diff --git a/src/ci/docker/host-x86_64/dist-x86_64-linux/shared.sh b/src/ci/docker/host-x86_64/dist-x86_64-linux/shared.sh
deleted file mode 100644
index dc86dddd464f2..0000000000000
--- a/src/ci/docker/host-x86_64/dist-x86_64-linux/shared.sh
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/sh
-hide_output() {
-  set +x
-  on_err="
-echo ERROR: An error was encountered with the build.
-cat /tmp/build.log
-exit 1
-"
-  trap "$on_err" ERR
-  bash -c "while true; do sleep 30; echo \$(date) - building ...; done" &
-  PING_LOOP_PID=$!
-  "$@" &> /tmp/build.log
-  trap - ERR
-  kill $PING_LOOP_PID
-  set -x
-}
diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-18/Dockerfile b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-18/Dockerfile
index 42df58517caf4..1cfa227344344 100644
--- a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-18/Dockerfile
+++ b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-18/Dockerfile
@@ -54,8 +54,8 @@ ENV RUST_CONFIGURE_ARGS \
       --set rust.randomize-layout=true \
       --set rust.thin-lto-import-instr-limit=10
 
-COPY host-x86_64/dist-x86_64-linux/shared.sh /scripts/
-COPY host-x86_64/dist-x86_64-linux/build-gccjit.sh /scripts/
+COPY scripts/shared.sh /scripts/
+COPY scripts/build-gccjit.sh /scripts/
 
 RUN /scripts/build-gccjit.sh /scripts
 
diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-19/Dockerfile b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-19/Dockerfile
index f2aadbe87cfec..b33cb6478afa2 100644
--- a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-19/Dockerfile
+++ b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-19/Dockerfile
@@ -54,8 +54,8 @@ ENV RUST_CONFIGURE_ARGS \
       --set rust.randomize-layout=true \
       --set rust.thin-lto-import-instr-limit=10
 
-COPY host-x86_64/dist-x86_64-linux/shared.sh /scripts/
-COPY host-x86_64/dist-x86_64-linux/build-gccjit.sh /scripts/
+COPY scripts/shared.sh /scripts/
+COPY scripts/build-gccjit.sh /scripts/
 
 RUN /scripts/build-gccjit.sh /scripts
 
diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile b/src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile
index 2a09cd54b139a..ab749b3fdd5a6 100644
--- a/src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile
+++ b/src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile
@@ -89,8 +89,8 @@ ENV HOST_TARGET x86_64-unknown-linux-gnu
 # assertions enabled! Therefore, we cannot force download CI rustc.
 #ENV FORCE_CI_RUSTC 1
 
-COPY host-x86_64/dist-x86_64-linux/shared.sh /scripts/
-COPY host-x86_64/dist-x86_64-linux/build-gccjit.sh /scripts/
+COPY scripts/shared.sh /scripts/
+COPY scripts/build-gccjit.sh /scripts/
 
 RUN /scripts/build-gccjit.sh /scripts
 
diff --git a/src/ci/docker/host-x86_64/dist-x86_64-linux/build-clang.sh b/src/ci/docker/scripts/build-clang.sh
similarity index 95%
rename from src/ci/docker/host-x86_64/dist-x86_64-linux/build-clang.sh
rename to src/ci/docker/scripts/build-clang.sh
index 2e08c87f278c0..47bfcfbecab38 100755
--- a/src/ci/docker/host-x86_64/dist-x86_64-linux/build-clang.sh
+++ b/src/ci/docker/scripts/build-clang.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-set -ex
+set -exu
 
 source shared.sh
 
@@ -34,7 +34,7 @@ hide_output \
       -DCOMPILER_RT_BUILD_XRAY=OFF \
       -DCOMPILER_RT_BUILD_MEMPROF=OFF \
       -DCOMPILER_RT_BUILD_CTX_PROFILE=OFF \
-      -DLLVM_TARGETS_TO_BUILD=X86 \
+      -DLLVM_TARGETS_TO_BUILD=$LLVM_BUILD_TARGETS \
       -DLLVM_INCLUDE_BENCHMARKS=OFF \
       -DLLVM_INCLUDE_TESTS=OFF \
       -DLLVM_INCLUDE_EXAMPLES=OFF \
diff --git a/src/ci/docker/host-x86_64/dist-x86_64-linux/build-gcc.sh b/src/ci/docker/scripts/build-gcc.sh
similarity index 87%
rename from src/ci/docker/host-x86_64/dist-x86_64-linux/build-gcc.sh
rename to src/ci/docker/scripts/build-gcc.sh
index e939a5d7eac4d..78a038215e4b9 100755
--- a/src/ci/docker/host-x86_64/dist-x86_64-linux/build-gcc.sh
+++ b/src/ci/docker/scripts/build-gcc.sh
@@ -50,7 +50,9 @@ cd ..
 rm -rf gcc-build
 rm -rf gcc-$GCC
 
-# FIXME: clang doesn't find 32-bit libraries in /rustroot/lib,
-# but it does look all the way under /rustroot/lib/[...]/32,
-# so we can link stuff there to help it out.
-ln /rustroot/lib/*.{a,so} -rst /rustroot/lib/gcc/x86_64-pc-linux-gnu/$GCC/32/
+if [[ $GCC_BUILD_TARGET == "i686" ]]; then
+    # FIXME: clang doesn't find 32-bit libraries in /rustroot/lib,
+    # but it does look all the way under /rustroot/lib/[...]/32,
+    # so we can link stuff there to help it out.
+    ln /rustroot/lib/*.{a,so} -rst /rustroot/lib/gcc/x86_64-pc-linux-gnu/$GCC/32/
+fi
diff --git a/src/ci/docker/host-x86_64/dist-x86_64-linux/build-gccjit.sh b/src/ci/docker/scripts/build-gccjit.sh
similarity index 100%
rename from src/ci/docker/host-x86_64/dist-x86_64-linux/build-gccjit.sh
rename to src/ci/docker/scripts/build-gccjit.sh
diff --git a/src/ci/docker/host-x86_64/dist-x86_64-linux/build-zstd.sh b/src/ci/docker/scripts/build-zstd.sh
similarity index 100%
rename from src/ci/docker/host-x86_64/dist-x86_64-linux/build-zstd.sh
rename to src/ci/docker/scripts/build-zstd.sh
diff --git a/src/ci/github-actions/jobs.yml b/src/ci/github-actions/jobs.yml
index 24a9f843f3368..d18eaa3e64b35 100644
--- a/src/ci/github-actions/jobs.yml
+++ b/src/ci/github-actions/jobs.yml
@@ -145,17 +145,17 @@ auto:
   - image: aarch64-gnu-debug
     <<: *job-linux-8c-aarch64
 
+  - image: dist-aarch64-linux
+    env:
+      CODEGEN_BACKENDS: llvm,cranelift
+    <<: *job-linux-8c-aarch64
+
   - image: arm-android
     <<: *job-linux-4c
 
   - image: armhf-gnu
     <<: *job-linux-4c
 
-  - image: dist-aarch64-linux
-    env:
-      CODEGEN_BACKENDS: llvm,cranelift
-    <<: *job-linux-4c
-
   - image: dist-android
     <<: *job-linux-4c