diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 73a203c..054a25c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -19,7 +19,6 @@ jobs:
       matrix:
         # If `Windows` support is removed - state so inthe README.md
         os: [ubuntu-latest, macos-latest, windows-latest]
-        bazel_mode: [bzlmod, workspace, both]
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4
@@ -31,11 +30,8 @@ jobs:
         # Share repository cache between workflows.
         repository-cache: true
     - name: Built & Test
-      env:
-        BZLMOD: ${{ matrix.bazel_mode != 'workspace' && '--enable_bzlmod' || '--noenable_bzlmod' }}
-        WORKSPACE: ${{ matrix.bazel_mode != 'bzlmod' && '--enable_workspace' || '--noenable_workspace' }}
       run: |
-        bazel test ${{env.BZLMOD}} ${{env.WORKSPACE}} //...
+        bazel test //...
 
   # Single aggregating gate for branch protection. It depends on every job that
   # must pass, so "done" is the only status check that needs to be marked
diff --git a/.github/workflows/release_prep.sh b/.github/workflows/release_prep.sh
index ff60290..1f3577c 100755
--- a/.github/workflows/release_prep.sh
+++ b/.github/workflows/release_prep.sh
@@ -28,7 +28,6 @@ function die() {
 # Custom args to update as needed.
 PACKAGE_NAME="bzl"
 BAZELMOD_NAME="helly25_bzl"
-WORKSPACE_NAME="helly25_bzl"
 PATCHES=()
 
 # Automatic vars from workflow integration.
@@ -40,8 +39,8 @@ if [[ "${TAG}" == "v${VERSION}" ]]; then
 fi
 
 # Computed vars.
-PREFIX="${PACKAGE_NAME}-${TAG}"         # Internal archive root directory folder: bzl-0.4.0
-ARCHIVE="${PACKAGE_NAME}-${TAG}.tar.gz" # Target asset name on GitHub: bzl-0.4.0.tar.gz
+PREFIX="${PACKAGE_NAME}-${TAG}"         # Internal archive root directory folder: bzl-0.5.0
+ARCHIVE="${PACKAGE_NAME}-${TAG}.tar.gz" # Target asset name on GitHub: bzl-0.5.0.tar.gz
 
 BAZELMOD_VERSION="$(sed -rne 's,.*version = "([0-9]+([.][0-9]+)+.*)".*,\1,p' <MODULE.bazel | head -n1)"
 CHANGELOG_VERSION="$(sed -rne 's,^# ([0-9]+([.][0-9]+)+.*)$,\1,p' <CHANGELOG.md | head -n1)"
@@ -64,7 +63,7 @@ fi
 } >BUILD.bazel
 
 # Apply patches
-for patch in "${PATCHES[@]}"; do
+for patch in ${PATCHES[@]+"${PATCHES[@]}"}; do
     patch -s -p 1 <"${patch}"
 done
 
@@ -85,10 +84,18 @@ EXCLUDES=(
     done
 } >>.gitattributes
 
-# Build the archive directly out into the parent repo workspace root folder path
-git archive --format=tar.gz --prefix="${PREFIX}/" "${TAG}" -o "${ARCHIVE}" --add-virtual-file="${PREFIX}/VERSION:${VERSION}" --worktree-attributes
-
-SHA256="$(shasum -a 256 "${ARCHIVE}" | awk '{print $1}')"
+# Build the archive from the patched/generated worktree, not the committed
+# "${TAG}" tree: `git archive "${TAG}"` reads the commit and would silently drop
+# the edits above (any patches, the generated BUILD.bazel). Stage the worktree
+# into a THROWAWAY index so the real index/checkout is never touched (nothing to
+# undo afterwards), and archive that tree. export-ignore still applies via the
+# staged .gitattributes (+ --worktree-attributes).
+TMP_INDEX="$(mktemp -u)"
+GIT_INDEX_FILE="${TMP_INDEX}" git read-tree HEAD
+GIT_INDEX_FILE="${TMP_INDEX}" git add --all
+ARCHIVE_TREE="$(GIT_INDEX_FILE="${TMP_INDEX}" git write-tree)"
+rm -f "${TMP_INDEX}"
+git archive --format=tar.gz --prefix="${PREFIX}/" -o "${ARCHIVE}" --add-virtual-file="${PREFIX}/VERSION:${VERSION}" --worktree-attributes "${ARCHIVE_TREE}"
 
 # Print header
 echo "# Version ${VERSION}"
@@ -103,17 +110,4 @@ cat <<EOF
 \`\`\`
 bazel_dep(name = "${BAZELMOD_NAME}", version = "${VERSION}")
 \`\`\`
-
-## For Bazel WORKSPACE
-
-\`\`\`
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-http_archive(
-  name = "${WORKSPACE_NAME}",
-  url = "https://github.com/helly25/${PACKAGE_NAME}/releases/download/${TAG}/${ARCHIVE}",
-  sha256 = "${SHA256}",
-  strip_prefix = "${PREFIX}",
-)
-\`\`\`
 EOF
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f6a47bf..7d9d1f4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,11 @@
-# 0.4.5
+# 0.5.0
+
+- [BC] Dropped legacy `WORKSPACE` support; the module is now bzlmod-only.
 
 # 0.4.4
 
+- Re-release of `0.4.3` with no functional changes (release/CI tooling only).
+
 # 0.4.3
 
 - Added `paths.ensure_trailing_slash` and `paths.ensure_trailing_slash_windows` to append a single trailing separator, handling roots and existing trailing separators. An optional `default_if_empty` controls the fallback for empty input (e.g. `"/"` to anchor at the platform root).
diff --git a/MODULE.bazel b/MODULE.bazel
index e6f9985..dbb2e24 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -16,7 +16,7 @@
 
 module(
     name = "helly25_bzl",
-    version = "0.4.5",
+    version = "0.5.0",
 )
 
 bazel_dep(name = "bazel_skylib", version = "1.7.1")
diff --git a/README.md b/README.md
index 3d1bcc2..b609426 100644
--- a/README.md
+++ b/README.md
@@ -97,11 +97,11 @@ Provides:
 
 ## Installation
 
-The library is available for both Bazelmod and Workspace installations and works
-on MacOS, Ubuntu and Windows with Bazel version 7.x and 8.x (Other systems are
-simply not tested). However future version may drop Windows support.
+The library is available as a Bazel module (bzlmod) and works on MacOS, Ubuntu
+and Windows with Bazel version 7.x and 8.x (Other systems are simply not tested).
+However future version may drop Windows support.
 
-### For MODULES.bazel
+### For MODULE.bazel
 
 See [helly25/bzl/releases](https://github.com/helly25/bzl/releases) to replace the version number.
 
@@ -109,18 +109,6 @@ See [helly25/bzl/releases](https://github.com/helly25/bzl/releases) to replace t
 bazel_dep(name = "helly25_bzl", version = "0.0.0")
 ```
 
-### For WORKSPACE
-
-```bazel
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-http_archive(
-  name = "helly25_bzl",
-  url = "https://github.com/helly25/bzl/releases/download/0.0.0/bzl-0.0.0.tar.gz",
-  sha256 = "...." # see https://github.com/helly25/bzl/releases for version numbers SHA256 codes.
-)
-```
-
 ### Dependencies
 
 - `bazel_skylib`.
diff --git a/WORKSPACE b/WORKSPACE
deleted file mode 100644
index dcdcd2c..0000000
--- a/WORKSPACE
+++ /dev/null
@@ -1,31 +0,0 @@
-# SPDX-FileCopyrightText: Copyright (c) The helly25 authors (helly25.com)
-# SPDX-License-Identifier: Apache-2.0
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-workspace(name = "helly25_bzl")
-
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-http_archive(
-    name = "bazel_skylib",
-    sha256 = "bc283cdfcd526a52c3201279cda4bc298652efa898b10b4db0837dc51652756f",
-    urls = [
-        "https://github.com/bazelbuild/bazel-skylib/releases/download/1.7.1/bazel-skylib-1.7.1.tar.gz",
-        "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.7.1/bazel-skylib-1.7.1.tar.gz",
-    ],
-)
-
-load("@bazel_skylib//:workspace.bzl", "bazel_skylib_workspace")
-
-bazel_skylib_workspace()