diff --git a/.github/workflows/test-pack-dist-dynamic.yaml b/.github/workflows/test-pack-dist-dynamic.yaml
new file mode 100644
index 0000000..cd2f8ed
--- /dev/null
+++ b/.github/workflows/test-pack-dist-dynamic.yaml
@@ -0,0 +1,25 @@
+name: Test pack-dist-dynamic
+on:
+  push:
+    paths:
+      - export-dynamic/**
+      - .github/workflows/test-pack-dist-dynamic.yaml
+  pull_request:
+    paths:
+      - export-dynamic/**
+      - .github/workflows/test-pack-dist-dynamic.yaml
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+
+      - name: Setup Node.js 24.x
+        uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
+        with:
+          node-version: 24.x
+
+      - name: Run pack-dist-dynamic tests
+        run: bash export-dynamic/pack-dist-dynamic.test.sh
diff --git a/export-dynamic/export-dynamic.sh b/export-dynamic/export-dynamic.sh
index 5c1d886..ac33f6f 100755
--- a/export-dynamic/export-dynamic.sh
+++ b/export-dynamic/export-dynamic.sh
@@ -37,6 +37,10 @@ fi
 # export INPUTS_CLI_CALLER=/path/to/node_modules/.bin/rhdh-cli
 INPUTS_CLI_CALLER=${INPUTS_CLI_CALLER:-"npx --yes ${INPUTS_CLI_PACKAGE}@${INPUTS_CLI_VERSION}"}
 
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=export-dynamic/pack-dist-dynamic.sh
+source "${SCRIPT_DIR}/pack-dist-dynamic.sh"
+
 # Check local installation first, then fall back to npx --yes (requires network)
 run_cli() {
     local cli_args=("$@")
@@ -208,8 +212,8 @@ else
             packDestination=${INPUTS_DESTINATION}
             mkdir -pv "${packDestination}"
 
-            echo "  running npm pack on the exported './dist-dynamic' sub-folder"
-            if ! json=$(npm pack ./dist-dynamic --pack-destination "$packDestination" --json); then
+            echo "  running npm pack on a hardlink-free copy of './dist-dynamic'"
+            if ! json=$(pack_dist_dynamic "$(pwd)/dist-dynamic" "$packDestination"); then
                 errors+=("${pluginPath}")
                 set -e
                 popd > /dev/null
diff --git a/export-dynamic/pack-dist-dynamic.sh b/export-dynamic/pack-dist-dynamic.sh
new file mode 100755
index 0000000..a994e2b
--- /dev/null
+++ b/export-dynamic/pack-dist-dynamic.sh
@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+# Stage dist-dynamic to a short, hardlink-free copy, then npm pack.
+#
+# Yarn nmMode: hardlinks-local trees crash npm 11 (`Exit handler never called!`).
+# `cp -r` (not `cp -a`) copies file contents and breaks those hardlinks.
+# A short /tmp prefix also avoids npm pack failures on very long paths (RHDHBUGS-3556).
+
+copy_dist_dynamic_without_hardlinks() {
+    local src="$1"
+    local dest="$2"
+
+    if [[ ! -d "$src" ]]; then
+        echo "  dist-dynamic directory not found: ${src}" >&2
+        return 1
+    fi
+    mkdir -p "$dest" || return 1
+    # Copy package contents into dest (not a nested dist-dynamic folder).
+    # Do not use cp -a / --preserve=links: that keeps Yarn hardlinks.
+    cp -r "${src}/." "${dest}/"
+}
+
+pack_dist_dynamic() {
+    local dist_dynamic="$1"
+    local pack_destination="$2"
+    local stage_dir
+    local output
+    local pack_status=0
+
+    mkdir -p "$pack_destination" || return 1
+
+    stage_dir=$(mktemp -d /tmp/dist-XXXXXX) || return 1
+    if ! copy_dist_dynamic_without_hardlinks "$dist_dynamic" "$stage_dir"; then
+        rm -rf "$stage_dir"
+        return 1
+    fi
+
+    # Pack the staged package root (equivalent to `npm pack .` in dist-dynamic).
+    output=$(
+        cd "$stage_dir" && npm pack --pack-destination "$pack_destination" --json --foreground-scripts=false
+    ) || pack_status=$?
+
+    rm -rf "$stage_dir"
+
+    if [[ "$pack_status" -ne 0 ]]; then
+        return "$pack_status"
+    fi
+    printf '%s' "$output"
+}
diff --git a/export-dynamic/pack-dist-dynamic.test.sh b/export-dynamic/pack-dist-dynamic.test.sh
new file mode 100755
index 0000000..c78034e
--- /dev/null
+++ b/export-dynamic/pack-dist-dynamic.test.sh
@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=export-dynamic/pack-dist-dynamic.sh
+source "${SCRIPT_DIR}/pack-dist-dynamic.sh"
+
+assert_eq() {
+    local description="$1"
+    local expected="$2"
+    local actual="$3"
+    if [[ "$expected" == "$actual" ]]; then
+        echo "PASS: ${description}"
+    else
+        echo "FAIL: ${description} (expected '${expected}', got '${actual}')" >&2
+        exit 1
+    fi
+}
+
+assert_true() {
+    local description="$1"
+    shift
+    if "$@"; then
+        echo "PASS: ${description}"
+    else
+        echo "FAIL: ${description}" >&2
+        exit 1
+    fi
+}
+
+WORKDIR=$(mktemp -d /tmp/pack-dist-dynamic-test-XXXXXX)
+trap 'rm -rf "$WORKDIR"' EXIT
+
+FIXTURE="${WORKDIR}/dist-dynamic"
+DEST="${WORKDIR}/archives"
+STAGE="${WORKDIR}/staged"
+
+mkdir -p "${FIXTURE}/node_modules/dup"
+cat > "${FIXTURE}/package.json" <<'EOF'
+{
+  "name": "test-hardlink-pack",
+  "version": "1.0.0",
+  "bundleDependencies": true
+}
+EOF
+printf 'payload\n' > "${FIXTURE}/payload.txt"
+# Same inode in two paths, matching Yarn hardlinks-local under node_modules.
+ln "${FIXTURE}/payload.txt" "${FIXTURE}/node_modules/dup/payload.txt"
+
+orig_hardlinks=$(find "$FIXTURE" -type f -links +1 | wc -l)
+assert_true "fixture has hardlinked files" test "${orig_hardlinks}" -gt 0
+
+copy_dist_dynamic_without_hardlinks "$FIXTURE" "$STAGE"
+staged_hardlinks=$(find "$STAGE" -type f -links +1 | wc -l)
+assert_eq "staged copy has no hardlinked files" "0" "${staged_hardlinks}"
+
+after_copy_orig=$(find "$FIXTURE" -type f -links +1 | wc -l)
+assert_eq "original tree still has hardlinks after copy" "${orig_hardlinks}" "${after_copy_orig}"
+
+json=$(pack_dist_dynamic "$FIXTURE" "$DEST")
+filename=$(echo "$json" | jq -r '.[0].filename')
+integrity=$(echo "$json" | jq -r '.[0].integrity')
+
+assert_true "npm pack returned a filename" test -n "$filename"
+assert_true "tgz exists in destination" test -f "${DEST}/${filename}"
+assert_true "integrity is non-empty" test -n "$integrity"
+
+echo "$integrity" > "${DEST}/${filename}.integrity"
+assert_true "integrity sidecar is written" test -f "${DEST}/${filename}.integrity"
+
+after_pack_orig=$(find "$FIXTURE" -type f -links +1 | wc -l)
+assert_eq "original tree still has hardlinks after pack" "${orig_hardlinks}" "${after_pack_orig}"
+
+echo "All pack-dist-dynamic tests passed."