diff --git a/.prettierignore b/.prettierignore
index 81f290b4a..b125d1594 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -9,5 +9,5 @@ cpython
 .vscode
 .pytest_cache
 .clang-format
-packages/libf2c/make.inc
+packages/libf2c/extras/make.inc
 src/js/generated_struct_info32.json
diff --git a/packages/coolprop/pyproject.toml b/packages/coolprop/extras/pyproject.toml
similarity index 100%
rename from packages/coolprop/pyproject.toml
rename to packages/coolprop/extras/pyproject.toml
diff --git a/packages/coolprop/setup.py b/packages/coolprop/extras/setup.py
similarity index 100%
rename from packages/coolprop/setup.py
rename to packages/coolprop/extras/setup.py
diff --git a/packages/coolprop/meta.yaml b/packages/coolprop/meta.yaml
index 5eaabeb93..b00141c74 100644
--- a/packages/coolprop/meta.yaml
+++ b/packages/coolprop/meta.yaml
@@ -10,9 +10,9 @@ source:
   extract_dir: source
 
   extras:
-    - - setup.py
+    - - extras/setup.py
       - ./setup.py
-    - - pyproject.toml
+    - - extras/pyproject.toml
       - ./pyproject.toml
 
 requirements:
diff --git a/packages/libf2c/make.inc b/packages/libf2c/extras/make.inc
similarity index 100%
rename from packages/libf2c/make.inc
rename to packages/libf2c/extras/make.inc
diff --git a/packages/libf2c/meta.yaml b/packages/libf2c/meta.yaml
index 893687b7c..29b243077 100644
--- a/packages/libf2c/meta.yaml
+++ b/packages/libf2c/meta.yaml
@@ -24,7 +24,7 @@ source:
     - patches/0006-adjust-ld-ar-ranlib.patch
 
   extras:
-    - [make.inc, make.inc]
+    - [extras/make.inc, make.inc]
 
 build:
   type: static_library
diff --git a/packages/matplotlib/src/Humor-Sans-1.0.ttf b/packages/matplotlib/extras/Humor-Sans-1.0.ttf
similarity index 100%
rename from packages/matplotlib/src/Humor-Sans-1.0.ttf
rename to packages/matplotlib/extras/Humor-Sans-1.0.ttf
diff --git a/packages/matplotlib/src/fontlist.json b/packages/matplotlib/extras/fontlist.json
similarity index 100%
rename from packages/matplotlib/src/fontlist.json
rename to packages/matplotlib/extras/fontlist.json
diff --git a/packages/matplotlib/src/setup.cfg b/packages/matplotlib/extras/setup.cfg
similarity index 100%
rename from packages/matplotlib/src/setup.cfg
rename to packages/matplotlib/extras/setup.cfg
diff --git a/packages/matplotlib/meta.yaml b/packages/matplotlib/meta.yaml
index adc8217b6..b50eb446a 100644
--- a/packages/matplotlib/meta.yaml
+++ b/packages/matplotlib/meta.yaml
@@ -17,7 +17,7 @@ source:
     - patches/fix-threading.patch
 
   extras:
-    - - src/setup.cfg
+    - - extras/setup.cfg
       - ./mplsetup.cfg
 
 build:
@@ -36,8 +36,8 @@ build:
     rm -rf matplotlib/backends/qt_editor
     rm -rf matplotlib/backends/web_backend
     rm -rf sphinxext
-    cp $PKGDIR/src/fontlist.json matplotlib
-    cp $PKGDIR/src/Humor-Sans-1.0.ttf matplotlib/mpl-data/fonts/ttf/Humor-Sans.ttf
+    cp $PKGDIR/extras/fontlist.json matplotlib
+    cp $PKGDIR/extras/Humor-Sans-1.0.ttf matplotlib/mpl-data/fonts/ttf/Humor-Sans.ttf
     mkdir -p $PKGDIR/../../dist/fonts
     cp matplotlib/mpl-data/fonts/ttf/* $PKGDIR/../../dist/fonts/
 
diff --git a/packages/nlopt/src/setup.py b/packages/nlopt/extras/setup.py
similarity index 100%
rename from packages/nlopt/src/setup.py
rename to packages/nlopt/extras/setup.py
diff --git a/packages/nlopt/meta.yaml b/packages/nlopt/meta.yaml
index e458d3b70..bf17fa829 100644
--- a/packages/nlopt/meta.yaml
+++ b/packages/nlopt/meta.yaml
@@ -9,7 +9,7 @@ source:
   sha256: b881cc2a5face5139f1c5a30caf26b7d3cb43d69d5e423c9d78392f99844499f
 
   extras:
-    - - src/setup.py
+    - - extras/setup.py
       - ./setup.py
 
 requirements:
diff --git a/packages/opencv-python/cmake/OpenCVFindLibsGrfmt.cmake b/packages/opencv-python/extras/OpenCVFindLibsGrfmt.cmake
similarity index 100%
rename from packages/opencv-python/cmake/OpenCVFindLibsGrfmt.cmake
rename to packages/opencv-python/extras/OpenCVFindLibsGrfmt.cmake
diff --git a/packages/opencv-python/cmake/build_args.sh b/packages/opencv-python/extras/build_args.sh
similarity index 100%
rename from packages/opencv-python/cmake/build_args.sh
rename to packages/opencv-python/extras/build_args.sh
diff --git a/packages/opencv-python/cmake/detect_ffmpeg.cmake b/packages/opencv-python/extras/detect_ffmpeg.cmake
similarity index 100%
rename from packages/opencv-python/cmake/detect_ffmpeg.cmake
rename to packages/opencv-python/extras/detect_ffmpeg.cmake
diff --git a/packages/opencv-python/meta.yaml b/packages/opencv-python/meta.yaml
index febbbf0a9..e4ed4958c 100644
--- a/packages/opencv-python/meta.yaml
+++ b/packages/opencv-python/meta.yaml
@@ -12,9 +12,9 @@ source:
   url: https://files.pythonhosted.org/packages/32/72/03747a6820bc970aeb0b89e653d1084068ac1ed606a83d8b5ac6fc237c14/opencv-python-4.8.0.76.tar.gz
   sha256: 56d84c43ce800938b9b1ec74b33942b2edbcef3f70c2754eb9bfe5dff1ee3ace
   extras:
-    - [cmake/OpenCVFindLibsGrfmt.cmake, opencv/cmake/OpenCVFindLibsGrfmt.cmake]
+    - [extras/OpenCVFindLibsGrfmt.cmake, opencv/cmake/OpenCVFindLibsGrfmt.cmake]
     - [
-        cmake/detect_ffmpeg.cmake,
+        extras/detect_ffmpeg.cmake,
         opencv/modules/videoio/cmake/detect_ffmpeg.cmake,
       ]
   patches:
@@ -52,4 +52,4 @@ build:
     export NUMPY_INCLUDE_DIR="$HOSTINSTALLDIR/lib/python$PYMAJOR.$PYMINOR/site-packages/numpy/core/include/"
     export FFMPEG_ROOT="$WASM_LIBRARY_DIR"
 
-    source $PKGDIR/cmake/build_args.sh
+    source $PKGDIR/extras/build_args.sh
diff --git a/pyproject.toml b/pyproject.toml
index 3b99051c8..54ee1c267 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -108,8 +108,8 @@ norecursedirs = [
 ]
 addopts = '''
 --doctest-modules
---ignore="packages/matplotlib/src"
 --ignore-glob="**/dist/"
+--ignore-glob="packages/**/extras/"
 --tb=short
 --dist-dir=dist'''
 testpaths = [