diff --git a/.github/workflows/cicd_deploy.yml b/.github/workflows/cicd_deploy.yml
index 50b5ebc..9ac6be6 100644
--- a/.github/workflows/cicd_deploy.yml
+++ b/.github/workflows/cicd_deploy.yml
@@ -5,6 +5,8 @@ on:
   push:
     branches:
       - main
+    paths-ignore:
+      - 'doc/**'
 
 env:
   DOCKER_REPO: ignimagelidar/pdal_ign_plugin
@@ -21,8 +23,14 @@ jobs:
     - name: install cppunit
       run: sudo apt install -y libcppunit-dev
 
-    - name: compil
-      run: build.sh
+    - uses: conda-incubator/setup-miniconda@v3
+      with:
+        activate-environment: pdal_ign_plugin
+        environment-file: ./environment.yml
+        auto-activate-base: true
+
+    - name: compil_plugins
+      run: source ./ci/build.sh
 
     - name: Login to Docker Hub
       uses: docker/login-action@v2
diff --git a/doc/grid_decimation.md b/doc/grid_decimation.md
index 1dd8451..66ce58c 100755
--- a/doc/grid_decimation.md
+++ b/doc/grid_decimation.md
@@ -15,8 +15,9 @@ This example transform highest points of classification 5 in classification 9, o
      "file-input.las",
     {
         "type": "filters.gridDecimation",
-		"output_type":"max",
-        "output_name_attribut": "grid"
+	"output_type":"max",
+        "output_name_attribut": "grid",
+	"output_wkt":"file-output.wkt"
     },
     {
           "type":"writers.las",
@@ -34,4 +35,6 @@ Options
 **resolution** :
   The resolution of the cells in meter. [Default: 1.]
 
-**output_name_attribut**: The name of the new attribut. [Default: grid]
\ No newline at end of file
+**output_name_attribut**: The name of the new attribut. [Default: grid]
+
+**output_wkt**: the name of the export grid file as wkt polygon. If none, no export [Default:""]