diff --git a/Golden_Repo/c/cppy/cppy-1.1.0-GCCcore-11.2.0.eb b/Golden_Repo/c/cppy/cppy-1.1.0-GCCcore-11.2.0.eb
new file mode 100644
index 0000000000000000000000000000000000000000..c117ab10281b5cbfa76d27dd02d5de15d077ce4d
--- /dev/null
+++ b/Golden_Repo/c/cppy/cppy-1.1.0-GCCcore-11.2.0.eb
@@ -0,0 +1,29 @@
+easyblock = 'PythonPackage'
+
+name = 'cppy'
+version = '1.1.0'
+
+homepage = "https://github.com/nucleic/cppy"
+description = """A small C++ header library which makes it easier to write
+Python extension modules. The primary feature is a PyObject smart pointer
+which automatically handles reference counting and provides convenience
+methods for performing common object operations."""
+
+
+toolchain = {'name': 'GCCcore', 'version': '11.2.0'}
+
+builddependencies = [('binutils', '2.37')]
+
+dependencies = [
+ ('Python', '3.9.6'),
+]
+
+source_urls = ['https://github.com/nucleic/cppy/archive/refs/tags/']
+sources = ['%(version)s.tar.gz']
+checksums = ['40a9672df1ec2d7f0b54f70e574101f42131c0f5e47980769f68085e728a4934']
+
+download_dep_fail = True
+sanity_pip_check = True
+use_pip = True
+
+moduleclass = 'tools'
diff --git a/Golden_Repo/g/gcccoremkl/gcccoremkl-11.2.0-2021.4.0.eb b/Golden_Repo/g/gcccoremkl/gcccoremkl-11.2.0-2021.4.0.eb
new file mode 100644
index 0000000000000000000000000000000000000000..1ed9f280781b9e105288c1fc0be3485ad203ba00
--- /dev/null
+++ b/Golden_Repo/g/gcccoremkl/gcccoremkl-11.2.0-2021.4.0.eb
@@ -0,0 +1,25 @@
+easyblock = "Toolchain"
+
+local_mklver = '2021.4.0'
+local_comp_version = '11.2.0'
+name = 'gcccoremkl'
+version = '%s-%s' % (local_comp_version, local_mklver)
+
+homepage = '(none)'
+description = """GCCcore compiler toolchain with MKL"""
+
+toolchain = SYSTEM
+
+local_comp_name = 'GCCcore'
+local_comp = (local_comp_name, local_comp_version)
+
+# compiler toolchain dependencies
+dependencies = [
+ local_comp,
+ ('binutils', '2.37', '', local_comp),
+ ('imkl', local_mklver, '', SYSTEM),
+]
+
+hiddendependencies = [('imkl', local_mklver, '', SYSTEM)]
+
+moduleclass = 'toolchain'
diff --git a/Golden_Repo/m/matplotlib/matplotlib-3.4.3-gcccoremkl-11.2.0-2021.4.0.eb b/Golden_Repo/m/matplotlib/matplotlib-3.4.3-gcccoremkl-11.2.0-2021.4.0.eb
new file mode 100644
index 0000000000000000000000000000000000000000..cf9ff56fd19886588404a82ddbced3bf78096ded
--- /dev/null
+++ b/Golden_Repo/m/matplotlib/matplotlib-3.4.3-gcccoremkl-11.2.0-2021.4.0.eb
@@ -0,0 +1,64 @@
+easyblock = 'PythonBundle'
+
+name = 'matplotlib'
+version = '3.4.3'
+
+homepage = 'https://matplotlib.org'
+description = """matplotlib is a python 2D plotting library which produces publication quality figures in a variety of
+ hardcopy formats and interactive environments across platforms. matplotlib can be used in python scripts, the python
+ and ipython shell, web application servers, and six graphical user interface toolkits."""
+
+toolchain = {'name': 'gcccoremkl', 'version': '11.2.0-2021.4.0'}
+
+builddependencies = [
+ ('pkg-config', '0.29.2'),
+ ('cppy', '1.1.0')
+]
+
+dependencies = [
+ ('Python', '3.9.6'),
+ ('SciPy-bundle', '2021.10'),
+ ('libpng', '1.6.37'),
+ ('freetype', '2.11.0'),
+ ('Tkinter', '%(pyver)s'),
+ ('Pillow', '8.3.1'),
+ ('Qhull', '2020.2')
+]
+
+use_pip = True
+sanity_pip_check = True
+
+# avoid that matplotlib downloads and builds its own copies of freetype and qhull
+_fix_setup = "sed -e 's/#system_freetype = False/system_freetype = True/g' "
+_fix_setup += "-e 's/#system_qhull = False/system_qhull = True/g' setup.cfg.template >setup.cfg && "
+
+_include_path = "export CPLUS_INCLUDE_PATH=$EBROOTFREETYPE/include/freetype2:${CPLUS_INCLUDE_PATH} && "
+
+exts_list = [
+ ('Cycler', '0.11.0', {
+ 'modulename': 'cycler',
+ 'source_tmpl': 'cycler-%(version)s.tar.gz',
+ 'source_urls': ['https://pypi.python.org/packages/source/C/Cycler'],
+ 'checksums': ['9c87405839a19696e837b3b818fed3f5f69f16f1eec1a1ad77e043dcea9c772f'],
+ }),
+ ('kiwisolver', '1.3.2', {
+ 'source_urls': ['https://pypi.python.org/packages/source/k/kiwisolver'],
+ 'checksums': ['fc4453705b81d03568d5b808ad8f09c77c47534f6ac2e72e733f9ca4714aa75c'],
+ }),
+ (name, version, {
+ 'preinstallopts': _fix_setup + _include_path,
+ 'source_urls': ['https://pypi.python.org/packages/source/m/matplotlib'],
+ 'checksums': ['fc4f526dfdb31c9bd6b8ca06bf9fab663ca12f3ec9cdf4496fb44bc680140318'],
+ }),
+]
+
+sanity_check_commands = [
+ """python -c 'import matplotlib; matplotlib.use("Agg"); import matplotlib.pyplot' """,
+ "python -c 'from mpl_toolkits.mplot3d import Axes3D'",
+]
+
+# use non-interactive plotting backend as default
+# see https://matplotlib.org/tutorials/introductory/usage.html#what-is-a-backend
+modextravars = {'MPLBACKEND': 'Agg'}
+
+moduleclass = 'vis'
diff --git a/Golden_Repo/p/Pillow/Pillow-8.3.1-GCCcore-11.2.0.eb b/Golden_Repo/p/Pillow/Pillow-8.3.1-GCCcore-11.2.0.eb
new file mode 100644
index 0000000000000000000000000000000000000000..32bbaf622c5a88d1a841f033674e715515e53023
--- /dev/null
+++ b/Golden_Repo/p/Pillow/Pillow-8.3.1-GCCcore-11.2.0.eb
@@ -0,0 +1,32 @@
+easyblock = 'PythonPackage'
+
+name = 'Pillow'
+version = '8.3.1'
+
+homepage = 'https://pillow.readthedocs.org/'
+description = """Pillow is the 'friendly PIL fork' by Alex Clark and Contributors.
+ PIL is the Python Imaging Library by Fredrik Lundh and Contributors."""
+
+toolchain = {'name': 'GCCcore', 'version': '11.2.0'}
+
+sources = [SOURCE_TAR_GZ]
+checksums = ['2cac53839bfc5cece8fdbe7f084d5e3ee61e1303cccc86511d351adcb9e2c792']
+
+builddependencies = [('binutils', '2.37')]
+
+dependencies = [
+ ('Python', '3.9.6'),
+ ('libjpeg-turbo', '2.0.6'),
+ ('libpng', '1.6.37'),
+ ('zlib', '1.2.11'),
+ ('LibTIFF', '4.3.0'),
+ ('freetype', '2.11.0')
+]
+
+download_dep_fail = True
+use_pip = True
+sanity_pip_check = True
+
+options = {'modulename': 'PIL'}
+
+moduleclass = 'vis'
diff --git a/Golden_Repo/s/SciPy-Stack/SciPy-Stack-2022-gcccoremkl-11.2.0-2021.4.0.eb b/Golden_Repo/s/SciPy-Stack/SciPy-Stack-2022-gcccoremkl-11.2.0-2021.4.0.eb
new file mode 100644
index 0000000000000000000000000000000000000000..d53328680ccb3fc4c04f166daeb8b26c984d02cf
--- /dev/null
+++ b/Golden_Repo/s/SciPy-Stack/SciPy-Stack-2022-gcccoremkl-11.2.0-2021.4.0.eb
@@ -0,0 +1,18 @@
+easyblock = 'Bundle'
+name = 'SciPy-Stack'
+version = '2022'
+
+homepage = 'http://www.scipy.org'
+description = """SciPy Stack is a collection of open source software for scientific computing in Python.
+"""
+
+toolchain = {'name': 'gcccoremkl', 'version': '11.2.0-2021.4.0'}
+
+dependencies = [
+ ('Python', '3.9.6'),
+ ('SciPy-bundle', '2021.10'),
+ ('matplotlib', '3.4.3'),
+ ('xarray', '0.20.1'),
+]
+
+moduleclass = 'vis'
diff --git a/Golden_Repo/s/SciPy-bundle/SciPy-bundle-2021.10-gcccoremkl-11.2.0-2021.4.0.eb b/Golden_Repo/s/SciPy-bundle/SciPy-bundle-2021.10-gcccoremkl-11.2.0-2021.4.0.eb
new file mode 100644
index 0000000000000000000000000000000000000000..3b638f8b6c2a1cdffd32ba9b84681d327721ce15
--- /dev/null
+++ b/Golden_Repo/s/SciPy-bundle/SciPy-bundle-2021.10-gcccoremkl-11.2.0-2021.4.0.eb
@@ -0,0 +1,82 @@
+easyblock = 'PythonBundle'
+
+name = 'SciPy-bundle'
+version = '2021.10'
+
+homepage = 'https://python.org/'
+description = "Bundle of Python packages for scientific software"
+
+toolchain = {'name': 'gcccoremkl', 'version': '11.2.0-2021.4.0'}
+toolchainopts = {'pic': True, 'lowopt': True}
+
+builddependencies = [
+ ('hypothesis', '6.14.6'),
+ ('UnZip', '6.0'),
+]
+
+dependencies = [
+ ('Python', '3.9.6'),
+ ('pybind11', '2.7.1'), # required by scipy
+]
+
+use_pip = True
+
+# order is important!
+exts_list = [
+ ('numpy', '1.21.3', {
+ 'sources': ['%(name)s-%(version)s.zip'],
+ 'patches': [
+ 'numpy-1.18.2-mkl.patch',
+ 'numpy-1.20.3_disable-broken-override-test.patch',
+ 'numpy-1.20.3_disable_fortran_callback_test.patch',
+ ],
+ 'checksums': [
+ '63571bb7897a584ca3249c86dd01c10bcb5fe4296e3568b2e9c1a55356b6410e', # numpy-1.21.3.zip
+ # numpy-1.18.2-mkl.patch
+ 'ea25ad5c0148c1398d282f0424e642fb9815a1a80f4512659b018e2adc378bcf',
+ # numpy-1.20.3_disable-broken-override-test.patch
+ '43cc2e675c52db1776efcc6c84ebd5fc008b48e6355c81087420d5e790e4af9b',
+ # numpy-1.20.3_disable_fortran_callback_test.patch
+ '44975a944544fd0e771b7e63c32590d257a3713070f8f7fdf60105dc516f1d75',
+ ],
+ }),
+ ('ply', '3.11', {
+ 'checksums': ['00c7c1aaa88358b9c765b6d3000c6eec0ba42abca5351b095321aef446081da3'],
+ }),
+ ('gast', '0.5.2', {
+ 'checksums': ['f81fcefa8b982624a31c9e4ec7761325a88a0eba60d36d1da90e47f8fe3c67f7'],
+ }),
+ ('beniget', '0.4.1', {
+ 'checksums': ['75554b3b8ad0553ce2f607627dad3d95c60c441189875b98e097528f8e23ac0c'],
+ }),
+ ('pythran', '0.10.0', {
+ 'checksums': ['9dac8e1d50f33d4676003e350b1f0c878ce113e6f907920e92dc103352cac5bf'],
+ }),
+ ('scipy', '1.7.1', {
+ 'checksums': ['6b47d5fa7ea651054362561a28b1ccc8da9368a39514c1bbf6c0977a1c376764'],
+ # compilation with Pythran enabled fails when using Intel compilers,
+ # see https://github.com/scipy/scipy/issues/14935
+ 'prebuildopts': "export SCIPY_USE_PYTHRAN=0 && ",
+ 'preinstallopts': "export SCIPY_USE_PYTHRAN=0 && ",
+ }),
+ ('numexpr', '2.7.3', {
+ 'checksums': ['43616529f9b7d1afc83386f943dc66c4da5e052f00217ba7e3ad8dd1b5f3a825'],
+ }),
+ ('Bottleneck', '1.3.2', {
+ 'checksums': ['20179f0b66359792ea283b69aa16366419132f3b6cf3adadc0c48e2e8118e573'],
+ }),
+ ('pandas', '1.3.4', {
+ 'preinstallopts': """sed -i 's@extra_compile_args = \["-Werror"\]@extra_compile_args = []@g' setup.py && """,
+ 'checksums': ['a2aa18d3f0b7d538e21932f637fbfe8518d085238b429e4790a35e1e44a96ffc'],
+ }),
+ ('mpmath', '1.2.1', {
+ 'checksums': ['79ffb45cf9f4b101a807595bcb3e72e0396202e0b1d25d689134b48c4216a81a'],
+ }),
+ ('deap', '1.3.1', {
+ 'checksums': ['11f54493ceb54aae10dde676577ef59fc52d52f82729d5a12c90b0813c857a2f'],
+ }),
+]
+
+sanity_pip_check = True
+
+moduleclass = 'lang'
diff --git a/Golden_Repo/t/Tkinter/Tkinter-3.9.6-GCCcore-11.2.0.eb b/Golden_Repo/t/Tkinter/Tkinter-3.9.6-GCCcore-11.2.0.eb
new file mode 100644
index 0000000000000000000000000000000000000000..36acc1886996cdc114ce656a38a8bee02f0572fd
--- /dev/null
+++ b/Golden_Repo/t/Tkinter/Tkinter-3.9.6-GCCcore-11.2.0.eb
@@ -0,0 +1,25 @@
+name = 'Tkinter'
+version = '3.9.6'
+
+homepage = 'https://python.org/'
+description = "Tkinter module, built with the Python buildsystem"
+
+toolchain = {'name': 'GCCcore', 'version': '11.2.0'}
+toolchainopts = {'pic': True}
+
+source_urls = ['https://www.python.org/ftp/python/%(version)s/']
+sources = ['Python-%(version)s.tgz']
+checksums = ['d0a35182e19e416fc8eae25a3dcd4d02d4997333e4ad1f2eee6010aadc3fe866']
+
+builddependencies = [
+ ('binutils', '2.37'),
+ ('libffi', '3.4.2'),
+]
+
+dependencies = [
+ ('Python', '3.9.6'),
+ ('Tk', '8.6.11'),
+ ('zlib', '1.2.11'),
+]
+
+moduleclass = 'lang'
diff --git a/Golden_Repo/x/xarray/xarray-0.20.1-gcccoremkl-11.2.0-2021.4.0.eb b/Golden_Repo/x/xarray/xarray-0.20.1-gcccoremkl-11.2.0-2021.4.0.eb
new file mode 100644
index 0000000000000000000000000000000000000000..e4c9cfa1fc69d22a4fcb669b6ecb352f0d40142e
--- /dev/null
+++ b/Golden_Repo/x/xarray/xarray-0.20.1-gcccoremkl-11.2.0-2021.4.0.eb
@@ -0,0 +1,25 @@
+easyblock = 'PythonPackage'
+
+name = 'xarray'
+version = '0.20.1'
+
+homepage = 'https://github.com/pydata/xarray'
+description = """xarray (formerly xray) is an open source project and Python package that aims to bring
+ the labeled data power of pandas to the physical sciences, by providing N-dimensional variants of the
+ core pandas data structures."""
+
+toolchain = {'name': 'gcccoremkl', 'version': '11.2.0-2021.4.0'}
+
+sources = [SOURCE_TAR_GZ]
+checksums = ['9c0bffd8b55fdef277f8f6c817153eb51fa4e58653a7ad92eaed9984164b7bdb']
+
+dependencies = [
+ ('Python', '3.9.6'),
+ ('SciPy-bundle', '2021.10'), # required for numpy, pandas
+]
+
+download_dep_fail = True
+use_pip = True
+sanity_pip_check = True
+
+moduleclass = 'data'