diff --git a/.github/workflows/presubmit.yml b/.github/workflows/presubmit.yml
index 675f37f4..0f1b460e 100644
--- a/.github/workflows/presubmit.yml
+++ b/.github/workflows/presubmit.yml
@@ -27,7 +27,11 @@ jobs:
         # 3.10 is not yet available in manylinux docker images.
         # https://github.com/pypa/manylinux
         # python: [3.6, 3.7, 3.8, 3.9, 3.10-dev]
-        python: [3.6, 3.7, 3.8, 3.9]
+        python: [3.6, 3.7, 3.8, 3.9, 3.10-dev]
+      # It is possible 3.10-dev will fail when the other versions are green.
+      # Turn off fast fail so if 3.10 fails the other required versions have
+      # the opportunity to pass.
+      fail-fast: false
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python
@@ -36,11 +40,11 @@ jobs:
         python-version: ${{ matrix.python }}
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        pip install setuptools wheel
+        python -m pip install --upgrade setuptools pip wheel
     - name: Build
       env:
         BUILD_PYTHON: ${{ matrix.python }}
+        CRC32C_PURE_PYTHON: "0"
       run: |
         ./scripts/manylinux/build.sh
     - name: Test Import
@@ -73,9 +77,10 @@ jobs:
         python-version: ${{ matrix.python }}
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        pip install setuptools wheel
+        python -m pip install --upgrade setuptools pip wheel
     - name: Build
+      env:
+        CRC32C_PURE_PYTHON: "0"
       run: |
         ./scripts/osx/build_gh_action.sh
     - name: Test Import
@@ -113,9 +118,10 @@ jobs:
         python-version: ${{ matrix.python }}
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        pip install setuptools wheel
+        python -m pip install --upgrade setuptools pip wheel
     - name: Build
+      env:
+        CRC32C_PURE_PYTHON: "0"
       run: |
         where python
         ./scripts/windows/build.bat ${{ matrix.python }}
diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index 3620ee78..33e4c8f3 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: [3.6, 3.7, 3.8, 3.9]
+        python: [3.6, 3.7, 3.8, 3.9, 3.10-dev]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python
@@ -37,6 +37,7 @@ jobs:
     - name: Build
       env:
         BUILD_PYTHON: ${{ matrix.python }}
+        CRC32C_PURE_PYTHON: "0"
       run: |
         ./scripts/manylinux/build.sh
     - name: Test Import
@@ -56,7 +57,7 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        python: [3.6, 3.7, 3.8, 3.9]
+        python: [3.6, 3.7, 3.8, 3.9, 3.10-dev]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python
@@ -68,6 +69,8 @@ jobs:
         python -m pip install --upgrade pip
         pip install setuptools wheel
     - name: Build
+      env:
+        CRC32C_PURE_PYTHON: "0"
       run: |
         ./scripts/osx/build_gh_action.sh
     - name: Test Import
@@ -87,7 +90,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        python: [3.6, 3.7, 3.8, 3.9]
+        python: [3.6, 3.7, 3.8, 3.9, 3.10-dev]
     steps:
     - uses: actions/checkout@v2
     - name: Add msbuild to PATH
@@ -104,6 +107,8 @@ jobs:
         python -m pip install --upgrade pip
         pip install setuptools wheel
     - name: Build
+      env:
+        CRC32C_PURE_PYTHON: "0"
       run: |
         where python
         ./scripts/windows/build.bat ${{ matrix.python }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c845a96d..a644191c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,23 @@
 
 [1]: https://pypi.org/project/google-crc32c/#history
 
+### [1.1.4](https://www.github.com/googleapis/python-crc32c/compare/v1.1.4...v1.1.4) (2021-09-02)
+
+
+### Bug Fixes
+
+* advise setting 'CRC32C_PURE_PYTHON' after build failure ([#84](https://www.github.com/googleapis/python-crc32c/issues/84)) ([6aa1cd6](https://www.github.com/googleapis/python-crc32c/commit/6aa1cd69376b57fbc9bc2c470ed63a270279623d))
+* restore building 'manylinux1' wheels ([#87](https://www.github.com/googleapis/python-crc32c/issues/87)) ([ebb9c68](https://www.github.com/googleapis/python-crc32c/commit/ebb9c68aca66e6b89d832e9e237679ac8b9ad344))
+* use correct Python 3.10 specifier ([#88](https://www.github.com/googleapis/python-crc32c/issues/88)) ([0c1b740](https://www.github.com/googleapis/python-crc32c/commit/0c1b740c195caed8ac1e67fc38d87073223a6b3d))
+
+### [1.1.4](https://www.github.com/googleapis/python-crc32c/compare/v1.1.3...v1.1.4) (2021-09-01)
+
+
+### Bug Fixes
+
+* advise setting 'CRC32C_PURE_PYTHON' after build failure ([#84](https://www.github.com/googleapis/python-crc32c/issues/84)) ([6aa1cd6](https://www.github.com/googleapis/python-crc32c/commit/6aa1cd69376b57fbc9bc2c470ed63a270279623d))
+* restore building 'manylinux1' wheels ([#87](https://www.github.com/googleapis/python-crc32c/issues/87)) ([ebb9c68](https://www.github.com/googleapis/python-crc32c/commit/ebb9c68aca66e6b89d832e9e237679ac8b9ad344))
+
 ### [1.1.3](https://www.github.com/googleapis/python-crc32c/compare/v1.1.2...v1.1.3) (2021-08-30)
 
 
diff --git a/README.md b/README.md
index e2daa49e..6f1563f4 100644
--- a/README.md
+++ b/README.md
@@ -13,41 +13,55 @@ Wheels are currently published for Python 3.6, 3.7, 3.8, 3.9 for multiple
 architectures. For information on building your own, please view [BUILDING.md](BUILDING.md).
 
 ## Linux
-Wheels are published for `manylinux1`, `manylinux2010`, `manylinux2014` for
-`x86_64`, `aarch64` architectures.
+Wheels are published for the following platforms / architectures:
 
-- google_crc32c-1.1.1-cp36-cp36m-manylinux1_x86_64.whl
-- google_crc32c-1.1.1-cp37-cp37m-manylinux1_x86_64.whl
-- google_crc32c-1.1.1-cp38-cp38-manylinux1_x86_64.whl
-- google_crc32c-1.1.1-cp39-cp39-manylinux1_x86_64.whl
+### `manylinux1` platform, `x86_64` architecture
+- `google_crc32c-1.1.4-cp36-cp36m-manylinux_2_5_x86_64.manylinux1_x86_64.whl`
+- `google_crc32c-1.1.4-cp37-cp37m-manylinux_2_5_x86_64.manylinux1_x86_64.whl`
+- `google_crc32c-1.1.4-cp38-cp38-manylinux_2_5_x86_64.manylinux1_x86_64.whl`
+- `google_crc32c-1.1.4-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.whl`
 
-- google_crc32c-1.1.1-cp36-cp36m-manylinux2010_x86_64.whl
-- google_crc32c-1.1.1-cp37-cp37m-manylinux2010_x86_64.whl
-- google_crc32c-1.1.1-cp38-cp38-manylinux2010_x86_64.whl
-- google_crc32c-1.1.1-cp39-cp39-manylinux2010_x86_64.whl
+### `manylinux2010` platform, `x86_64` architecture
+- `google_crc32c-1.1.4-cp36-cp36m-manylinux_2_12_x86_64.manylinux2010_x86_64.whl`
+- `google_crc32c-1.1.4-cp37-cp37m-manylinux_2_12_x86_64.manylinux2010_x86_64.whl`
+- `google_crc32c-1.1.4-cp38-cp38-manylinux_2_12_x86_64.manylinux2010_x86_64.whl`
+- `google_crc32c-1.1.4-cp39-cp39-manylinux_2_12_x86_64.manylinux2010_x86_64.whl`
+- `google_crc32c-1.1.4-cp310-cp310-manylinux_2_12_x86_64.manylinux2010_x86_64.whl`
 
-- google_crc32c-1.1.1-cp36-cp36-manylinux2014_aarch64.whl
-- google_crc32c-1.1.1-cp37-cp37-manylinux2014_aarch64.whl
-- google_crc32c-1.1.1-cp38-cp38-manylinux2014_aarch64.whl
-- google_crc32c-1.1.1-cp39-cp39-manylinux2014_aarch64.whl
+### `manylinux2014` platform, `x86_64` architecture
+- `google_crc32c-1.1.4-cp36-cp36-manylinux_2_17_x86_64.manylinux2014_x86_64.whl`
+- `google_crc32c-1.1.4-cp37-cp37-manylinux_2_17_x86_64.manylinux2014_x86_64.whl`
+- `google_crc32c-1.1.4-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl`
+- `google_crc32c-1.1.4-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl`
+- `google_crc32c-1.1.4-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl`
+
+### `manylinux2014` platform, `aarch64` architecture
+- `google_crc32c-1.1.4-cp36-cp36-manylinux_2_17_aarch64.manylinux2014_aarch64.whl`
+- `google_crc32c-1.1.4-cp37-cp37-manylinux_2_17_aarch64.manylinux2014_aarch64.whl`
+- `google_crc32c-1.1.4-cp38-cp38-manylinux_2_17_aarch64.manylinux2014_aarch64.whl`
+- `google_crc32c-1.1.4-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl`
+- `google_crc32c-1.1.4-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl`
 
 ## Mac OS
 Wheels are published for `x86_64` architectures
 
-- google_crc32c-1.1.1-cp36-cp36m-macosx_10_14_x86_64.whl
-- google_crc32c-1.1.1-cp37-cp37m-macosx_10_14_x86_64.whl
-- google_crc32c-1.1.1-cp38-cp38-macosx_10_14_x86_64.whl
-- google_crc32c-1.1.1-cp39-cp39-macosx_10_14_x86_64.whl
+- `google_crc32c-1.1.4-cp36-cp36m-macosx_10_14_x86_64.whl`
+- `google_crc32c-1.1.4-cp37-cp37m-macosx_10_14_x86_64.whl`
+- `google_crc32c-1.1.4-cp38-cp38-macosx_10_14_x86_64.whl`
+- `google_crc32c-1.1.4-cp39-cp39-macosx_10_14_x86_64.whl`
+- `google_crc32c-1.1.4-cp310-cp310-macosx_10_14_x86_64.whl`
 
 ## Windows
 Wheels are published for `win32` and `win_amd64` architectures.
 
-- google_crc32c-1.1.1-cp36-cp36m-win32.whl
-- google_crc32c-1.1.1-cp37-cp37m-win32.whl
-- google_crc32c-1.1.1-cp38-cp38-win32.whl
-- google_crc32c-1.1.1-cp39-cp39-win32.whl
+- `google_crc32c-1.1.4-cp36-cp36m-win32.whl`
+- `google_crc32c-1.1.4-cp37-cp37m-win32.whl`
+- `google_crc32c-1.1.4-cp38-cp38-win32.whl`
+- `google_crc32c-1.1.4-cp39-cp39-win32.whl`
+- `google_crc32c-1.1.4-cp310-cp310-win32.whl`
 
-- google_crc32c-1.1.1-cp36-cp36m-win_amd64.whl
-- google_crc32c-1.1.1-cp37-cp37m-win_amd64.whl
-- google_crc32c-1.1.1-cp38-cp38-win_amd64.whl
-- google_crc32c-1.1.1-cp39-cp39-win_amd64.whl
+- `google_crc32c-1.1.4-cp36-cp36m-win_amd64.whl`
+- `google_crc32c-1.1.4-cp37-cp37m-win_amd64.whl`
+- `google_crc32c-1.1.4-cp38-cp38-win_amd64.whl`
+- `google_crc32c-1.1.4-cp39-cp39-win_amd64.whl`
+- `google_crc32c-1.1.4-cp310-cp310-win_amd64.whl`
diff --git a/scripts/manylinux/build.sh b/scripts/manylinux/build.sh
index 8276a887..6dfb4582 100755
--- a/scripts/manylinux/build.sh
+++ b/scripts/manylinux/build.sh
@@ -21,12 +21,25 @@ MANYLINUX_DIR=$(echo $(cd $(dirname ${0}); pwd))
 SCRIPTS_DIR=$(dirname ${MANYLINUX_DIR})
 REPO_ROOT=$(dirname ${SCRIPTS_DIR})
 
-docker pull quay.io/pypa/manylinux2010_x86_64	
-docker pull quay.io/pypa/manylinux2014_x86_64
 
 cd $REPO_ROOT
 git submodule update --init --recursive 
 
+# Note:  PyPA's support for the 'manylinux1' image ends on 2022-01-01.
+#        See: https://github.com/pypa/manylinux/issues/994
+#        No 3.10 support for 'manylinux1'.
+if [[ "${BUILD_PYTHON}" != "3.10"* ]]; then
+    docker pull quay.io/pypa/manylinux1_x86_64
+    docker run \
+        --rm \
+        --interactive \
+        --volume ${REPO_ROOT}:/var/code/python-crc32c/ \
+        --env BUILD_PYTHON=${BUILD_PYTHON} \
+        quay.io/pypa/manylinux1_x86_64 \
+        /var/code/python-crc32c/scripts/manylinux/build_on_centos.sh
+fi
+
+docker pull quay.io/pypa/manylinux2010_x86_64	
 docker run \
     --rm \
     --interactive \
@@ -35,6 +48,7 @@ docker run \
     quay.io/pypa/manylinux2010_x86_64 \
     /var/code/python-crc32c/scripts/manylinux/build_on_centos.sh
 
+docker pull quay.io/pypa/manylinux2014_x86_64
 docker run \
     --rm \
     --interactive \
@@ -44,6 +58,7 @@ docker run \
     /var/code/python-crc32c/scripts/manylinux/build_on_centos.sh
 
 docker run --rm --privileged hypriot/qemu-register
+docker pull quay.io/pypa/manylinux2014_aarch64
 docker run \
     --rm \
     --interactive \
diff --git a/scripts/manylinux/build_on_centos.sh b/scripts/manylinux/build_on_centos.sh
index 8515e46a..efc027f6 100755
--- a/scripts/manylinux/build_on_centos.sh
+++ b/scripts/manylinux/build_on_centos.sh
@@ -66,7 +66,7 @@ if [[ -z ${BUILD_PYTHON} ]]; then
         fi
     done
 else
-    STRIPPED_PYTHON=$(echo ${BUILD_PYTHON} | sed -e "s/\.//g")
+    STRIPPED_PYTHON=$(echo ${BUILD_PYTHON} | sed -e "s/\.//g" | sed -e "s/-dev$//")
     for PYTHON_BIN in /opt/python/*/bin; do
         if [[ "${PYTHON_BIN}" == *"${STRIPPED_PYTHON}"* ]]; then
             PYTHON_VERSIONS="${PYTHON_VERSIONS} ${PYTHON_BIN}"
diff --git a/setup.cfg b/setup.cfg
index cb8358ef..3be11080 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -14,7 +14,7 @@
 
 [metadata]
 name = google-crc32c
-version = 1.1.3
+version = 1.1.4
 description = A python wrapper of the C library 'Google CRC32C'
 url = https://github.com/googleapis/python-crc32c
 long_description = file: README.md
diff --git a/setup.py b/setup.py
index 3dc9a97a..0458e8d0 100644
--- a/setup.py
+++ b/setup.py
@@ -12,15 +12,19 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import logging
 import os
 import shutil
 import setuptools
 import setuptools.command.build_ext
-import warnings
 
 _EXTRA_DLL = "extra-dll"
 _DLL_FILENAME = "crc32c.dll"
-CRC32C_PURE_PYTHON = os.getenv("CRC32C_PURE_PYTHON") is not None
+
+# Explicit environment variable disables pure-Python fallback
+CRC32C_PURE_PYTHON_EXPLICIT = "CRC32C_PURE_PYTHON" in os.environ
+_FALSE_OPTIONS = ("0", "false", "no", "False", "No", None)
+CRC32C_PURE_PYTHON = os.getenv("CRC32C_PURE_PYTHON") not in _FALSE_OPTIONS
 
 
 def copy_dll(build_lib):
@@ -54,14 +58,27 @@ def run(self):
 
 
 if CRC32C_PURE_PYTHON:
-    ext_modules = []
+    setuptools.setup(
+        packages=["google_crc32c"],
+        package_dir={"": "src"},
+        ext_modules=[],
+    )
 else:
-    ext_modules = [module]
-
-
-setuptools.setup(
-    packages=["google_crc32c"],
-    package_dir={"": "src"},
-    ext_modules=ext_modules,
-    cmdclass={"build_ext": BuildExtWithDLL},
-)
+    try:
+        setuptools.setup(
+            packages=["google_crc32c"],
+            package_dir={"": "src"},
+            ext_modules=[module],
+            cmdclass={"build_ext": BuildExtWithDLL},
+        )
+    except SystemExit:
+        if "CRC32C_PURE_PYTHON" not in os.environ:
+            # If build / install fails, it is likely a compilation error with
+            # the C extension:  advise user how to enable the pure-Python
+            # build.
+            logging.error(
+                "Compiling the C Extension for the crc32c library failed. "
+                "To enable building / installing a pure-Python-only version, "
+                "set 'CRC32C_PURE_PYTHON=1' in the environment."
+            )
+        raise