fix : before wheel script

.gitlab/ci/cibuildwheel_build_deps_before_build_wheel.sh

 #!/bin/bash
-set -x
 set -e
 if [[ "$1" == "" ]]; then 
   echo "build aidge deps in cibuildwheel container before building wheel."
@@ -7,23 +6,25 @@ if [[ "$1" == "" ]]; then
   echo "Hint : In wheel containers, files are mounted on /host by default."
   echo "\nusage : ./cibuildwheel_build_deps_before_build_wheel.sh $search_path"
 fi
+set -x
 if [[ $AIDGE_DEPENDENCIES ==  "" ]]; then # case for aidge_ core
   mkdir -p build # creating build if its not already there to hold the build of cpp files
   rm -rf build/* # build from scratch
 else 
   for repo in $AIDGE_DEPENDENCIES ; do # case for other projects
     search_path=$1
-    REPO_PATH=$(find $search_path -type d -name $repo      \
-                                -not -path '*install*'     \
-                                -not -path '*.git*'        \
-                                -not -path '*miniconda*'   \
-                                -not -path '*conda*'       \
-                                -not -path '*.local*'      \
-                                -not -path "*lib*"         \
-                                -not -path "*/$repo/$repo" \
-                                -not -path "*/proc/*"      \
-                                -print -quit) 
-    if [[ "$REPO_PATH" == "" ]]; then 
+    REPO_PATH=$(find $search_path ! -writable -prune -o  -type d     \
+                                    -name "$repo"                    \
+                                    -not -path "*/install/*"         \
+                                    -not -path "*/.git/*"            \
+                                    -not -path "*/miniconda/*"       \
+                                    -not -path "*/conda/*"           \
+                                    -not -path "*/.local/*"          \
+                                    -not -path "*/lib/*"             \
+                                    -not -path "*/$repo/$repo/*"     \
+                                    -not -path "*/proc/*"            \
+                                    -print -quit)
+    if [[ -z "$REPO_PATH" ]]; then 
       echo "ERROR : dependency $repo not found in search_path \"$search_path\". ABORTING."
       exit -1
     fi