diff --git a/action.yml b/action.yml
index 2c45e20..29ca885 100644
--- a/action.yml
+++ b/action.yml
@@ -26,83 +26,19 @@ runs:
         INPUT_SLUG_MAXLENGTH: ${{ inputs.slug-maxlength }}
         INPUT_SHORT_LENGTH: ${{ inputs.short-length }}
 
-    # From Environment Variables
-    - uses: rlespinasse/slugify-value@a4879db1eb3db9bbee01dca36f98a8236c2b8239 # v1.4.0
-      with:
-        key: GITHUB_REPOSITORY
-        value: ${{ github.repository }}
-        prefix: ${{ inputs.prefix }}
-        slug-maxlength: ${{ inputs.slug-maxlength }}
-    - uses: rlespinasse/slugify-value@a4879db1eb3db9bbee01dca36f98a8236c2b8239 # v1.4.0
-      with:
-        key: GITHUB_REF
-        prefix: ${{ inputs.prefix }}
-        slug-maxlength: ${{ inputs.slug-maxlength }}
-    - uses: rlespinasse/slugify-value@a4879db1eb3db9bbee01dca36f98a8236c2b8239 # v1.4.0
-      with:
-        key: GITHUB_HEAD_REF
-        prefix: ${{ inputs.prefix }}
-        slug-maxlength: ${{ inputs.slug-maxlength }}
-    - uses: rlespinasse/slugify-value@a4879db1eb3db9bbee01dca36f98a8236c2b8239 # v1.4.0
-      with:
-        key: GITHUB_BASE_REF
-        prefix: ${{ inputs.prefix }}
-        slug-maxlength: ${{ inputs.slug-maxlength }}
-
-    # From Specific values
-    - uses: rlespinasse/slugify-value@a4879db1eb3db9bbee01dca36f98a8236c2b8239 # v1.4.0
-      with:
-        key: GITHUB_EVENT_REF
-        value: ${{ github.event.ref }}
-        prefix: ${{ inputs.prefix }}
-        slug-maxlength: ${{ inputs.slug-maxlength }}
-    - uses: rlespinasse/slugify-value@a4879db1eb3db9bbee01dca36f98a8236c2b8239 # v1.4.0
-      with:
-        key: GITHUB_REF_NAME
-        value: ${{ github.ref_name }}
-        prefix: ${{ inputs.prefix }}
-        slug-maxlength: ${{ inputs.slug-maxlength }}
-    - uses: rlespinasse/slugify-value@a4879db1eb3db9bbee01dca36f98a8236c2b8239 # v1.4.0
-      with:
-        key: GITHUB_REF_POINT
-        value: ${{ env.GITHUB_HEAD_REF_RAW || env.GITHUB_REF_NAME_RAW }}
-        prefix: ${{ inputs.prefix }}
-        slug-maxlength: ${{ inputs.slug-maxlength }}
+    # From Environment Variables, Specific values and Calculated values
+    # Consolidated into a single step to avoid the runner printing a
+    # repeated "env:" dump for every shell run step (see issue #161).
+    - run: $GITHUB_ACTION_PATH/slugify-env.sh
+      id: slugify-env
+      shell: bash
       env:
-        GITHUB_HEAD_REF_RAW: ${{ github.head_ref }}
-        GITHUB_REF_NAME_RAW: ${{ github.ref_name }}
-
-    # From Calculated values
-    - id: get-github-repository-owner-part
-      run: |
-        ownerpart=$(echo $GITHUB_REPOSITORY | cut -d/ -f1)
-        if [ -f "$GITHUB_OUTPUT" ]; then
-          echo "github-repository-owner-part=${ownerpart}" >> "$GITHUB_OUTPUT"
-        else
-          echo "::set-output name=github-repository-owner-part::${ownerpart}"
-        fi
-      shell: bash
-    - uses: rlespinasse/slugify-value@a4879db1eb3db9bbee01dca36f98a8236c2b8239 # v1.4.0
-      with:
-        key: GITHUB_REPOSITORY_OWNER_PART
-        value: ${{ steps.get-github-repository-owner-part.outputs.github-repository-owner-part }}
-        prefix: ${{ inputs.prefix }}
-        slug-maxlength: ${{ inputs.slug-maxlength }}
-    - id: get-github-repository-name-part
-      run: |
-        namepart=$(echo $GITHUB_REPOSITORY | cut -d/ -f2)
-        if [ -f "$GITHUB_OUTPUT" ]; then
-          echo "github-repository-name-part=${namepart}" >> "$GITHUB_OUTPUT"
-        else
-          echo "::set-output name=github-repository-name-part::${namepart}"
-        fi
-      shell: bash
-    - uses: rlespinasse/slugify-value@a4879db1eb3db9bbee01dca36f98a8236c2b8239 # v1.4.0
-      with:
-        key: GITHUB_REPOSITORY_NAME_PART
-        value: ${{ steps.get-github-repository-name-part.outputs.github-repository-name-part }}
-        prefix: ${{ inputs.prefix }}
-        slug-maxlength: ${{ inputs.slug-maxlength }}
+        INPUT_PREFIX: ${{ inputs.prefix }}
+        INPUT_SLUG_MAXLENGTH: ${{ inputs.slug-maxlength }}
+        INPUT_GITHUB_REPOSITORY: ${{ github.repository }}
+        INPUT_GITHUB_EVENT_REF: ${{ github.event.ref }}
+        INPUT_GITHUB_REF_NAME: ${{ github.ref_name }}
+        GITHUB_HEAD_REF: ${{ github.head_ref }}
 
     # From sha
     - uses: rlespinasse/shortify-git-revision@c90ba7007ef6c152254d10b9f1a327966ab13077 # v1.6.0
diff --git a/slugify-env.sh b/slugify-env.sh
new file mode 100755
index 0000000..40b9dce
--- /dev/null
+++ b/slugify-env.sh
@@ -0,0 +1,98 @@
+#!/usr/bin/env bash
+
+# Consolidates the 9 previous `rlespinasse/slugify-value` composite action calls
+# into a single shell step, to avoid the "env:" dump printed by the runner's
+# log renderer for every shell run step (see issue #161). This script
+# reimplements slugify-value's slug/slug-cs/slug-url/slug-url-cs/reduce logic
+# verbatim and writes the same GITHUB_ENV lines as before, for each key.
+
+if [[ "$OSTYPE" == "darwin"* ]]; then
+  # On MacOS,
+  # bash don't support substitution, so we use 'tr'
+  upper() { tr '[:lower:]' '[:upper:]' <<<"$1"; }
+  lower() { tr '[:upper:]' '[:lower:]' <<<"$1"; }
+else
+  upper() { local s="$1"; echo "${s^^}"; }
+  lower() { local s="$1"; echo "${s,,}"; }
+fi
+
+PREFIX=$(upper "$INPUT_PREFIX")
+
+MAX_LENGTH=""
+if [ -z "${INPUT_SLUG_MAXLENGTH}" ]; then
+  echo "::error ::slug-maxlength cannot be empty"
+  exit 1
+elif [ "${INPUT_SLUG_MAXLENGTH}" -eq "${INPUT_SLUG_MAXLENGTH}" ] 2>/dev/null; then
+  MAX_LENGTH="${INPUT_SLUG_MAXLENGTH}"
+elif [ "${INPUT_SLUG_MAXLENGTH}" == "nolimit" ]; then
+  MAX_LENGTH="${INPUT_SLUG_MAXLENGTH}"
+else
+  echo "::error ::slug-maxlength must be a number or equals to 'nolimit'"
+  exit 1
+fi
+
+slug() {
+  # 1st : Remove refs prefix
+  # 2d : Replace unwanted characters
+  # 3d : Remove leading hypens
+  output=$(sed -E 's#refs/[^\/]*/##;s/[^a-zA-Z0-9._-]+/-/g;s/^-*//' <<<"$1")
+  reduce "$output"
+}
+
+slug_url() {
+  # 1st : Remove refs prefix
+  # 2d : Replace unwanted characters
+  # 3d : Remove leading hypens
+  output=$(sed -E 's#refs/[^\/]*/##;s/[^a-zA-Z0-9-]+/-/g;s/^-*//' <<<"$1")
+  reduce "$output"
+}
+
+reduce() {
+  reduced_value="$1"
+  if [ "${MAX_LENGTH}" != "nolimit" ]; then
+    reduced_value=$(cut -c1-"${MAX_LENGTH}" <<<"$reduced_value")
+  fi
+  # 1st : Remove trailing hypens
+  sed -E 's/-*$//' <<<"$reduced_value"
+}
+
+# Owner/name parts, computed inline (replaces the two helper `id:` steps' outputs)
+GITHUB_REPOSITORY_OWNER_PART_VALUE=$(cut -d/ -f1 <<<"$INPUT_GITHUB_REPOSITORY")
+GITHUB_REPOSITORY_NAME_PART_VALUE=$(cut -d/ -f2 <<<"$INPUT_GITHUB_REPOSITORY")
+
+process() {
+  local key="$1"
+  local value="$2"
+  local cs_value="${value:-${!key}}"
+  local upper_key
+  upper_key=$(upper "$key")
+  local val
+  val=$(lower "$cs_value")
+  local slug_v slug_cs slug_url_v slug_url_cs
+  slug_v=$(slug "$val")
+  slug_cs=$(slug "$cs_value")
+  slug_url_v=$(slug_url "$val")
+  slug_url_cs=$(slug_url "$cs_value")
+  {
+    echo "${PREFIX}${upper_key}=${cs_value}"
+    echo "${PREFIX}${upper_key}_SLUG=${slug_v}"
+    echo "${PREFIX}${upper_key}_SLUG_CS=${slug_cs}"
+    echo "${PREFIX}${upper_key}_SLUG_URL=${slug_url_v}"
+    echo "${PREFIX}${upper_key}_SLUG_URL_CS=${slug_url_cs}"
+  } >>"$GITHUB_ENV"
+}
+
+# From Environment Variables
+process GITHUB_REPOSITORY "$INPUT_GITHUB_REPOSITORY"
+process GITHUB_REF ""
+process GITHUB_HEAD_REF ""
+process GITHUB_BASE_REF ""
+
+# From Specific values
+process GITHUB_EVENT_REF "$INPUT_GITHUB_EVENT_REF"
+process GITHUB_REF_NAME "$INPUT_GITHUB_REF_NAME"
+process GITHUB_REF_POINT "${GITHUB_HEAD_REF:-$INPUT_GITHUB_REF_NAME}"
+
+# From Calculated values
+process GITHUB_REPOSITORY_OWNER_PART "$GITHUB_REPOSITORY_OWNER_PART_VALUE"
+process GITHUB_REPOSITORY_NAME_PART "$GITHUB_REPOSITORY_NAME_PART_VALUE"