diff --git a/.github/workflows/build_wheels_linux.yml b/.github/workflows/build_wheels_linux.yml
index 3e3e010b..a368661d 100644
--- a/.github/workflows/build_wheels_linux.yml
+++ b/.github/workflows/build_wheels_linux.yml
@@ -171,8 +171,6 @@ jobs:
 
     - name: Build a package
       run: |
-        # Download all 3rdparty files
-        source scripts/source-packages-preparation.sh ${{ github.workspace }}
         set -e
         # Build and package
         set -x
diff --git a/scripts/source-packages-preparation.sh b/scripts/source-packages-preparation.sh
deleted file mode 100755
index be49b5b8..00000000
--- a/scripts/source-packages-preparation.sh
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/bin/bash
-
-# ${1} variable is a path to repository opencv-python
-
-# Define flags
-if [ "0" == $ENABLE_CONTRIB ]; then
-  git submodule update --init opencv
-  EXTRA_CMAKE_OPTIONS="-DOPENCV_DOWNLOAD_PATH=${1}/opencv/3rdparty"
-else
-  git submodule update --init opencv opencv_contrib
-  EXTRA_CMAKE_OPTIONS="-DOPENCV_DOWNLOAD_PATH=${1}/opencv/3rdparty -DOPENCV_EXTRA_MODULES_PATH=${1}/opencv_contrib/modules"
-fi
-
-# Download 3rdparty files
-cd opencv && \
-mkdir generate && \
-cd generate && \
-cmake $EXTRA_CMAKE_OPTIONS ${1}/opencv && \
-cd ${1} && \
-rm -rf opencv/generate
diff --git a/setup.py b/setup.py
index c9f09212..5784d5a4 100644
--- a/setup.py
+++ b/setup.py
@@ -162,8 +162,6 @@ def main():
             "-DPYTHON3_LIMITED_API=ON",
             "-DBUILD_OPENEXR=ON",
             "-DBUILD_PNG=ON",
-            # To have all 3rdparty files in one place for source packages
-            "-DOPENCV_DOWNLOAD_PATH=%s" % (os.path.join(os.path.dirname(os.path.abspath(__file__)), "opencv", "3rdparty")),
         ]
         + (
             # If it is not defined 'linker flags: /machine:X86' on Windows x64
@@ -414,7 +412,8 @@ def _classify_installed_files_override(
                     final_install_relpaths.append(new_install_relpath)
                     del m, fslash_relpath, new_install_relpath
                 else:
-                    if not found:
+                    # gapi can be missed if ADE was not downloaded (network issue)
+                    if not found and "gapi" not in relpath_re:
                         raise Exception("Not found: '%s'" % relpath_re)
                 del r, found