diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 4b690b61aa..758585ba76 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -94,22 +94,4 @@ jobs:
       - name: Test with hello world
         run: |
           curl -OL https://raw.githubusercontent.com/roc-lang/examples/refs/heads/main/examples/HelloWorld/main.roc
-          docker compose -f docker/nightly-debian-bookworm/docker-compose.yml run roc main.roc
-
-  nightly-debian-buster:
-    name: nightly-debian-buster
-    runs-on: [ubuntu-22.04]
-    timeout-minutes: 120
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Copy example docker file
-        run: cp docker/nightly-debian-buster/docker-compose.example.yml docker/nightly-debian-buster/docker-compose.yml
-
-      - name: Build image
-        run: docker compose -f docker/nightly-debian-buster/docker-compose.yml build
-
-      - name: Test with hello world
-        run: |
-          curl -OL https://raw.githubusercontent.com/roc-lang/examples/refs/heads/main/examples/HelloWorld/main.roc
-          docker compose -f docker/nightly-debian-buster/docker-compose.yml run roc main.roc
+          docker compose -f docker/nightly-debian-bookworm/docker-compose.yml run roc main.roc
\ No newline at end of file
diff --git a/.github/workflows/nightly_old_linux_arm64.yml b/.github/workflows/nightly_old_linux_arm64.yml
deleted file mode 100644
index 2fc072a5d4..0000000000
--- a/.github/workflows/nightly_old_linux_arm64.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-on:
-  #pull_request:
-  workflow_dispatch:
-  schedule:
-    - cron:  '0 9 * * *'
-
-name: Nightly Release Old Linux arm64 using Earthly
-
-jobs:
-  build:
-    name: build and package nightly release
-    runs-on: [self-hosted, Linux, ARM64]
-    timeout-minutes: 180
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: get commit SHA
-        run:  echo "SHA=$(git rev-parse --short "$GITHUB_SHA")" >> $GITHUB_ENV
-
-      - name: get date
-        run: echo "DATE=$(date "+%Y-%m-%d")" >> $GITHUB_ENV
-
-      - name: build file name
-        env:
-            DATE: ${{ env.DATE }}
-            SHA: ${{ env.SHA }}
-        run: echo "RELEASE_FOLDER_NAME=roc_nightly-old_linux_arm64-$DATE-$SHA" >> $GITHUB_ENV
-
-      - run: earthly --version
-
-      - name: build release with earthly
-        run: earthly +build-nightly-release  --RELEASE_FOLDER_NAME=${{ env.RELEASE_FOLDER_NAME }} --ZIG_ARCH=aarch64
-
-      - name: Upload roc nightly tar. Actually uploading to github releases has to be done manually.
-        uses: actions/upload-artifact@v4
-        with:
-           name: ${{ env.RELEASE_FOLDER_NAME }}.tar.gz
-           path: ${{ env.RELEASE_FOLDER_NAME }}.tar.gz
-           retention-days: 4
diff --git a/.github/workflows/nightly_old_linux_x86_64.yml b/.github/workflows/nightly_old_linux_x86_64.yml
deleted file mode 100644
index 8d115c3040..0000000000
--- a/.github/workflows/nightly_old_linux_x86_64.yml
+++ /dev/null
@@ -1,42 +0,0 @@
-on:
-  #pull_request:
-  workflow_dispatch:
-  schedule:
-    - cron:  '0 9 * * *'
-
-name: Nightly Release Old Linux x86_64 using Earthly
-
-jobs:
-  build:
-    name: build and package nightly release
-    runs-on: [ubuntu-22.04]
-    timeout-minutes: 90
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: get commit SHA
-        run:  echo "SHA=$(git rev-parse --short "$GITHUB_SHA")" >> $GITHUB_ENV
-
-      - name: get date
-        run: echo "DATE=$(date "+%Y-%m-%d")" >> $GITHUB_ENV
-
-      - name: build file name
-        env:
-            DATE: ${{ env.DATE }}
-            SHA: ${{ env.SHA }}
-        run: echo "RELEASE_FOLDER_NAME=roc_nightly-old_linux_x86_64-$DATE-$SHA" >> $GITHUB_ENV
-
-      - name: install earthly
-        run: sudo /bin/sh -c 'wget https://github.com/earthly/earthly/releases/latest/download/earthly-linux-amd64 -O /usr/local/bin/earthly && chmod +x /usr/local/bin/earthly && /usr/local/bin/earthly bootstrap --with-autocomplete'
-
-      - run: earthly --version
-
-      - name: build release with earthly
-        run: earthly +build-nightly-release  --RELEASE_FOLDER_NAME=${{ env.RELEASE_FOLDER_NAME }} --RUSTFLAGS="-C target-cpu=x86-64"
-
-      - name: Upload roc nightly tar. Actually uploading to github releases has to be done manually.
-        uses: actions/upload-artifact@v4
-        with:
-           name: ${{ env.RELEASE_FOLDER_NAME }}.tar.gz
-           path: ${{ env.RELEASE_FOLDER_NAME }}.tar.gz
-           retention-days: 4
diff --git a/.github/workflows/test_alpha_many_os.yml b/.github/workflows/test_alpha_many_os.yml
index 89fd9fc067..2fc0cfb3e0 100644
--- a/.github/workflows/test_alpha_many_os.yml
+++ b/.github/workflows/test_alpha_many_os.yml
@@ -65,20 +65,4 @@ jobs:
 
       - name: prep and run basic tests
         run: |
-          ./ci/basic_release_test.sh roc_release.tar.gz
-
-      - name: test with old linux release (x86_64)
-        if: startsWith(matrix.os, 'ubuntu') && !endsWith(matrix.os, '-arm')
-        run: |
-          ASSETS_URL="${{ steps.get_release.outputs.assets_url }}"
-          DOWNLOAD_URL=$(curl -sH "Authorization: token ${{ secrets.GITHUB_TOKEN }}" "$ASSETS_URL" | jq -r '.[] | select(.name | startswith("roc-old_linux_x86_64-")) | .browser_download_url')
-          curl -fLH "Authorization: token ${{ secrets.GITHUB_TOKEN }}" "$DOWNLOAD_URL" -o roc_release.tar.gz
-          ./ci/basic_release_test.sh roc_release.tar.gz
-
-      - name: test with old linux release (arm64)
-        if: startsWith(matrix.os, 'ubuntu') && endsWith(matrix.os, '-arm')
-        run: |
-          ASSETS_URL="${{ steps.get_release.outputs.assets_url }}"
-          DOWNLOAD_URL=$(curl -sH "Authorization: token ${{ secrets.GITHUB_TOKEN }}" "$ASSETS_URL" | jq -r '.[] | select(.name | startswith("roc-old_linux_arm64-")) | .browser_download_url')
-          curl -fLH "Authorization: token ${{ secrets.GITHUB_TOKEN }}" "$DOWNLOAD_URL" -o roc_release.tar.gz
           ./ci/basic_release_test.sh roc_release.tar.gz
\ No newline at end of file
diff --git a/.github/workflows/test_nightly_many_os.yml b/.github/workflows/test_nightly_many_os.yml
index 7be00a6200..79f3f9e144 100644
--- a/.github/workflows/test_nightly_many_os.yml
+++ b/.github/workflows/test_nightly_many_os.yml
@@ -48,16 +48,4 @@ jobs:
 
       - name: prep and run basic tests
         run: |
-          ./ci/basic_release_test.sh roc_release.tar.gz
-
-      - name: test with old linux release (x86_64)
-        if: startsWith(matrix.os, 'ubuntu') && !endsWith(matrix.os, '-arm')
-        run: |
-          curl -fL https://github.com/roc-lang/roc/releases/download/nightly/roc_nightly-old_linux_x86_64-latest.tar.gz -o roc_release.tar.gz
-          ./ci/basic_release_test.sh roc_release.tar.gz
-
-      - name: test with old linux release (arm64)
-        if: startsWith(matrix.os, 'ubuntu') && endsWith(matrix.os, '-arm')
-        run: |
-          curl -fL https://github.com/roc-lang/roc/releases/download/nightly/roc_nightly-old_linux_arm64-latest.tar.gz -o roc_release.tar.gz
           ./ci/basic_release_test.sh roc_release.tar.gz
\ No newline at end of file
diff --git a/Earthfile b/Earthfile
deleted file mode 100644
index ed5b19f198..0000000000
--- a/Earthfile
+++ /dev/null
@@ -1,59 +0,0 @@
-
-VERSION 0.6
-FROM rust:1.77.2-slim-buster # make sure to update rust-toolchain.toml too so that everything uses the same rust version
-WORKDIR /earthbuild
-
-prep-debian:
-    RUN apt -y update
-
-install-other-libs:
-    FROM +prep-debian
-    RUN apt -y install wget git
-    RUN apt -y install libunwind-dev pkg-config zlib1g-dev
-    RUN apt -y install unzip # for www/build.sh
-
-install-zig-llvm:
-    ARG ZIG_ARCH
-    FROM +install-other-libs
-    # zig
-    RUN wget -c https://ziglang.org/download/0.13.0/zig-linux-$ZIG_ARCH-0.13.0.tar.xz --no-check-certificate
-    RUN tar -xf zig-linux-$ZIG_ARCH-0.13.0.tar.xz
-    RUN ln -s /earthbuild/zig-linux-$ZIG_ARCH-0.13.0/zig /bin/zig
-    # zig builtins wasm tests
-    RUN apt -y install build-essential
-    # llvm
-    RUN apt -y install lsb-release software-properties-common gnupg
-    RUN wget https://apt.llvm.org/llvm.sh
-    RUN chmod +x llvm.sh
-    RUN ./llvm.sh 18
-    RUN ln -s /usr/bin/clang-18 /usr/bin/clang
-    # use lld as linker
-    RUN ln -s /usr/bin/lld-18 /usr/bin/ld.lld
-    RUN apt -y install libpolly-18-dev # required by llvm-sys crate
-    ENV RUSTFLAGS="-C link-arg=-fuse-ld=lld -C target-cpu=native"
-    RUN apt -y install libssl-dev
-    RUN wget https://rustwasm.github.io/wasm-pack/installer/init.sh -O init.sh && sh init.sh
-    # sccache
-    RUN cargo install sccache --locked
-    RUN sccache -V
-    ENV RUSTC_WRAPPER=/usr/local/cargo/bin/sccache
-    ENV SCCACHE_DIR=/earthbuild/sccache_dir
-    ENV CARGO_INCREMENTAL=0 # no need to recompile package when using new function
-
-copy-dirs:
-    ARG ZIG_ARCH
-    FROM +install-zig-llvm --ZIG_ARCH=$ZIG_ARCH
-    COPY --dir crates examples Cargo.toml Cargo.lock version.txt .cargo www rust-toolchain.toml ./
-
-build-nightly-release:
-    ARG RELEASE_FOLDER_NAME
-    ARG RUSTFLAGS
-    ARG ZIG_ARCH=x86_64
-    FROM +copy-dirs --ZIG_ARCH=$ZIG_ARCH
-    COPY --dir .git LICENSE LEGAL_DETAILS ci ./
-    # version.txt is used by the CLI: roc --version
-    RUN ./ci/write_version.sh
-    RUN RUSTFLAGS=$RUSTFLAGS cargo build --profile=release-with-lto --locked --bin roc --bin roc_language_server
-    RUN ./ci/package_release.sh $RELEASE_FOLDER_NAME
-    RUN ls
-    SAVE ARTIFACT ./$RELEASE_FOLDER_NAME.tar.gz AS LOCAL $RELEASE_FOLDER_NAME.tar.gz
diff --git a/docker/nightly-debian-buster/Dockerfile b/docker/nightly-debian-buster/Dockerfile
deleted file mode 100644
index c847fcd211..0000000000
--- a/docker/nightly-debian-buster/Dockerfile
+++ /dev/null
@@ -1,18 +0,0 @@
-FROM debian:buster
-
-RUN apt-get update --fix-missing
-RUN apt-get upgrade --yes
-
-RUN apt-get install --yes wget
-
-# you can leave out libc-dev and binutils if you don't need the REPL
-RUN apt-get install --yes libc-dev binutils
-
-RUN wget -q -O roc.tar.gz https://github.com/roc-lang/roc/releases/download/nightly/roc_nightly-old_linux_x86_64-latest.tar.gz
-
-RUN mkdir /usr/lib/roc
-
-RUN tar -xvz -f roc.tar.gz --directory /usr/lib/roc --strip-components=1
-
-ENV PATH="$PATH:/usr/lib/roc"
-
diff --git a/docker/nightly-debian-buster/docker-compose.example.yml b/docker/nightly-debian-buster/docker-compose.example.yml
deleted file mode 100644
index d33c7ff31f..0000000000
--- a/docker/nightly-debian-buster/docker-compose.example.yml
+++ /dev/null
@@ -1,8 +0,0 @@
-version: "3"
-services:
-  roc:
-    build: .
-    entrypoint: roc
-    working_dir: /home/ubuntu/app
-    volumes:
-      - ../../:/home/ubuntu/app
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index ffc963e20c..7ae6fe8c79 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -3,7 +3,6 @@
 #  - update `channel = "RUST_VERSION"`
 #  - update `channel = "RUST_VERSION"` in examples/platform-switching/rust-platform/rust-toolchain.toml
 #  - update `channel = "RUST_VERSION"` in examples/glue/rust-platform/rust-toolchain.toml
-#  - update FROM rust:RUST_VERSION-slim-buster in Earthfile 
 #  - to update the nightly version:
 #     - Find the latest nightly release that matches RUST_VERSION here: https://github.com/oxalica/rust-overlay/tree/master/manifests/nightly/2024
 #     - update `channel = "nightly-OLD_DATE"` below