diff --git a/.github/workflows/windows-npm.yml b/.github/workflows/windows-npm.yml
index 4ab3d58d5b9..cf6d9d525da 100644
--- a/.github/workflows/windows-npm.yml
+++ b/.github/workflows/windows-npm.yml
@@ -139,6 +139,47 @@ jobs:
           nvm install ${{ matrix.npm-node-version }}
           node -v
 
+  wsl_matrix_unofficial:
+    name: 'WSL nvm install'
+    defaults:
+      run:
+          shell: wsl-bash {0}
+    runs-on: windows-latest
+    env:
+      WSLENV: NVM_INSTALL_GITHUB_REPO:NVM_INSTALL_VERSION:/p
+      NVM_NODEJS_ORG_MIRROR: https://unofficial-builds.nodejs.org/download/release
+    strategy:
+      fail-fast: false
+      matrix:
+        wsl-distrib:
+          - Alpine
+        npm-node-version:
+          - '--lts'
+          - '21'
+          - '18'
+          - '16'
+          - '14'
+          - '12'
+          - '11'
+          - '10'
+        method:
+          - ''
+          - 'script'
+    steps:
+      - uses: Vampire/setup-wsl@v1
+        with:
+          distribution: ${{ matrix.wsl-distrib }}
+          additional-packages: bash git curl ca-certificates wget
+      - name: Retrieve nvm on WSL
+        run: |
+          if [ -z "${{ matrix.method }}" ]; then
+            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | bash
+          else
+            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | METHOD="${{matrix.method}}" bash
+          fi
+          . "$HOME/.nvm/nvm.sh"
+          nvm install ${{ matrix.npm-node-version }}
+
   nvm_windows:
     name: 'tests, on windows'
     permissions:
diff --git a/nvm.sh b/nvm.sh
index faee82933e2..9319521f5d3 100644
--- a/nvm.sh
+++ b/nvm.sh
@@ -1965,6 +1965,10 @@ nvm_get_arch() {
     HOST_ARCH=armv7l
   fi
 
+  if [ -f "/etc/alpine-release" ]; then
+    NVM_ARCH=x64-musl
+  fi
+
   nvm_echo "${NVM_ARCH}"
 }
 
diff --git a/test/fast/Unit tests/nvm_get_arch_unofficial b/test/fast/Unit tests/nvm_get_arch_unofficial
new file mode 100755
index 00000000000..12c5da0f955
--- /dev/null
+++ b/test/fast/Unit tests/nvm_get_arch_unofficial	
@@ -0,0 +1,94 @@
+#!/bin/sh
+
+# Save the PATH as it was when the test started to restore it when it finishes
+ORIG_PATH="${PATH}"
+
+cleanup() {
+  # Restore the PATH as it was when the test started
+  export PATH="${ORIG_PATH}"
+  rm -rf "${TMP_DIR}"
+}
+
+die() {
+  cleanup
+  echo "$@"
+  exit 1
+}
+
+. ../../../nvm.sh
+
+# Sets the PATH for these tests to include the symlinks to the mocked binaries
+export PATH=".:${PATH}"
+
+TMP_DIR=$(mktemp -d)
+CHROOT_WITH_ALPINE="$TMP_DIR/with_alpine"
+CHROOT_WITHOUT_ALPINE="$TMP_DIR/without_alpine"
+
+setup_chroot() {
+  chroot_dir=$1
+
+  # Directories
+  mkdir -p "${chroot_dir}/etc"
+  mkdir -p "${chroot_dir}/bin"
+  mkdir -p "${chroot_dir}/usr/bin"
+  mkdir -p "${chroot_dir}/lib64"
+  mkdir -p "${chroot_dir}/dev"
+
+  # Files and binaries
+  cp ../../../nvm.sh "${chroot_dir}/"
+  cp /bin/sh /usr/bin/dirname "${chroot_dir}/bin/"
+  [ "${chroot_dir}" = "${CHROOT_WITH_ALPINE}" ] && touch "${chroot_dir}/etc/alpine-release"
+
+  # Libraries
+  for binary in /bin/sh /usr/bin/dirname; do
+    for lib in $(ldd $binary | awk '{print $3}' | grep "^/"); do
+      dir=$(dirname "${lib}")
+      mkdir -p "${chroot_dir}${dir}"
+      cp "${lib}" "${chroot_dir}${dir}/"
+    done
+  done
+
+  # Dynamic linker
+  cp /lib64/ld-linux-x86-64.so.2 "${chroot_dir}/lib64/"
+
+  # /dev/null
+  sudo mknod "${chroot_dir}/dev/null" c 1 3
+}
+
+setup_chroot "${CHROOT_WITH_ALPINE}"
+setup_chroot "${CHROOT_WITHOUT_ALPINE}"
+
+# Run tests in chroot environments
+ARCH_WITH_ALPINE=$(sudo chroot "${CHROOT_WITH_ALPINE}" /bin/sh -c ". ./nvm.sh && nvm_get_arch")
+[ "${ARCH_WITH_ALPINE}" = "x64-musl" ] || die "Expected x64-musl for alpine environment but got ${ARCH_WITH_ALPINE}"
+
+ARCH_WITHOUT_ALPINE=$(sudo chroot "${CHROOT_WITHOUT_ALPINE}" /bin/sh -c ". ./nvm.sh && nvm_get_arch")
+[ "${ARCH_WITHOUT_ALPINE}" != "x64-musl" ] || die "Did not expect x64-musl for non-alpine environment"
+
+# Run tests for nvm ls-remote
+test_default_ls_remote() {
+  mock_response='N/A'
+  result=$(NVM_NODEJS_ORG_MIRROR='http://nonexistent-url' nvm ls-remote 18)
+  if [ "${result}" = "${mock_response}" ]; then
+    die "Test failed: Expected '${mock_response}' for but got '${result}'"
+  else
+    echo "Test passed"
+  fi
+}
+
+test_unofficial_mirror_ls_remote() {
+  mock_response='v18.18.0   (LTS: Hydrogen)'
+  result=$(NVM_NODEJS_ORG_MIRROR='https://unofficial-builds.nodejs.org/download/release' nvm ls-remote 18.18.0 | sed -e 's/^[[:space:]]*//')
+  result=$(echo "${result}" | sed 's/\x1b\[[0-9;]*m//g')
+
+  if [ "${result}" = "${mock_response}" ]; then
+    echo "Test passed"
+  else
+    die "Test failed: Expected '${mock_response}' but got '${result}'"
+  fi
+}
+
+test_default_ls_remote
+test_unofficial_mirror_ls_remote
+
+cleanup