diff --git a/h/Hypre/Hypre-2.18.2-intel-2020a.eb b/h/Hypre/Hypre-2.18.2-intel-2020a.eb
new file mode 100644
index 00000000..2ef3d821
--- /dev/null
+++ b/h/Hypre/Hypre-2.18.2-intel-2020a.eb
@@ -0,0 +1,20 @@
+# IT4Innovations 2020
+
+name = 'Hypre'
+version = '2.18.2'
+
+homepage = 'https://computation.llnl.gov/projects/hypre-scalable-linear-solvers-multigrid-methods'
+description = """Hypre is a library for solving large, sparse linear systems of equations on massively
+ parallel computers. The problems of interest arise in the simulation codes being developed at LLNL
+ and elsewhere to study physical phenomena in the defense, environmental, energy, and biological sciences."""
+
+toolchain = {'name': 'intel', 'version': '2020a'}
+toolchainopts = {'pic': True}
+
+source_urls = ['https://github.com/hypre-space/hypre/archive/']
+sources = ['v%(version)s.tar.gz']
+checksums = ['28007b5b584eaf9397f933032d8367788707a2d356d78e47b99e551ab10cc76a']
+
+start_dir = 'src'
+
+moduleclass = 'numlib'
diff --git a/n/numba/numba-0.48.0-Py-3.7.eb b/n/numba/numba-0.48.0-Py-3.7.eb
new file mode 100644
index 00000000..febfb93d
--- /dev/null
+++ b/n/numba/numba-0.48.0-Py-3.7.eb
@@ -0,0 +1,51 @@
+# IT4Innovations 2020
+
+easyblock = 'PythonBundle'
+
+name = 'numba'
+version = '0.48.0'
+
+homepage = 'https://numba.pydata.org/'
+description = """Numba is an Open Source NumPy-aware optimizing compiler for
+Python sponsored by Continuum Analytics, Inc. It uses the remarkable LLVM
+compiler infrastructure to compile Python syntax to machine code."""
+
+toolchain = {'name': 'Py', 'version': '3.7'}
+toolchainopts = {'pic': True}
+
+dependencies = [
+    ('numpy', '1.8.1'),
+    ('scipy', '1.4.1'),
+    ('LLVM', '8.0.1'),
+]
+
+use_pip = True
+sanity_pip_check = True
+
+exts_default_options = {'source_urls': [PYPI_SOURCE]}
+
+exts_list = [
+    ('llvmlite', '0.31.0', {
+        'patches': ['llvmlite-0.31.0_fix-ffi-Makefile.patch'],
+        'preinstallopts': "export LLVM_CONFIG=${EBROOTLLVM}/bin/llvm-config && ",
+        'checksums': [
+            '22ab2b9d7ec79fab66ac8b3d2133347de86addc2e2df1b3793e523ac84baa3c8',  # llvmlite-0.31.0.tar.gz
+            # llvmlite-0.31.0_fix-ffi-Makefile.patch
+            '672aba7b753dcfe5cb07c731bf1ec8bde1de148d4e0e2d10f6be81fb17f34bbc',
+        ],
+    }),
+    (name, version, {
+        'checksums': ['c0703df0a0ea2e29fbef7937d9849cc4734253066cb5820c5d6e0851876e3b0a'],
+    }),
+]
+
+fix_python_shebang_for = ['bin/*']
+
+sanity_check_paths = {
+    'files': ['bin/numba', 'bin/pycc'],
+    'dirs': ['lib/python%(pyshortver)s/site-packages'],
+}
+
+sanity_check_commands = ["numba --help"]
+
+moduleclass = 'lang'
diff --git a/p/PETSc/PETSc-3.12.4-intel-2020a.eb b/p/PETSc/PETSc-3.12.4-intel-2020a.eb
index 074f5f2f..778b2808 100644
--- a/p/PETSc/PETSc-3.12.4-intel-2020a.eb
+++ b/p/PETSc/PETSc-3.12.4-intel-2020a.eb
@@ -24,7 +24,7 @@ checksums = [
     '64cf9d5008d5e92117e65bdec5316d991b6a6b8c8ecf7ea46eb790a498266297',  # PETSc_ranlib-fix.patch
 ]
 
-builddependencies = [('CMake', '3.16.2')]
+builddependencies = [('CMake', '3.16.2', '', True)]
 
 dependencies = [
     ('Boost', '1.72.0'),
diff --git a/p/petsc4py/petsc4py-3.12.0-Py-3.7.eb b/p/petsc4py/petsc4py-3.12.0-Py-3.7.eb
new file mode 100644
index 00000000..1c9d11e3
--- /dev/null
+++ b/p/petsc4py/petsc4py-3.12.0-Py-3.7.eb
@@ -0,0 +1,29 @@
+# IT4Innovations 2020
+
+easyblock = "PythonPackage"
+
+name = "petsc4py"
+version = "3.12.0"
+
+homepage = 'https://code.google.com/p/petsc4py/'
+description = """petsc4py are Python bindings for PETSc, the Portable, Extensible Toolchain for Scientific Computation."""
+
+
+toolchain = {'name': 'Py', 'version': '3.7'}
+
+source_urls = [PYPI_SOURCE]
+sources = [SOURCE_TAR_GZ]
+
+dependencies = [
+    ('PETSc', '3.12.4', '', ('intel', '2020a')),
+    ('numpy', '1.18.1'),
+]
+
+sanity_check_commands = ["python -c 'from petsc4py import PETSc'"]
+
+sanity_check_paths = {
+    'files': [],
+    'dirs': ['lib/python3.7/site-packages/%(name)s']
+}
+
+moduleclass = 'tools'
diff --git a/p/pybind11/pybind11-2.4.3-Py-3.7.eb b/p/pybind11/pybind11-2.4.3-Py-3.7.eb
new file mode 100644
index 00000000..63a8ef78
--- /dev/null
+++ b/p/pybind11/pybind11-2.4.3-Py-3.7.eb
@@ -0,0 +1,20 @@
+# IT4Innovations 2020
+
+easyblock = "PythonPackage"
+name = 'pybind11'
+version = '2.4.3'
+
+homepage = 'https://pypi.python.org/pypi/pybind11'
+description = 'pybind11 is a lightweight header-only library that exposes C++ types in Python and vice versa, mainly to create Python bindings of existing C++ code.'
+
+toolchain = {'name': 'Py', 'version': '3.7'}
+
+source_urls = [PYPI_SOURCE]
+sources = [SOURCE_TAR_GZ]
+
+sanity_check_paths = {
+    'dirs': [],
+    'files': ['lib/python3.7/site-packages/%(name)s-%(version)s-py3.7.egg'],
+}
+
+moduleclass = 'python'
diff --git a/s/SLEPc/SLEPc-3.12.2-intel-2020a.eb b/s/SLEPc/SLEPc-3.12.2-intel-2020a.eb
new file mode 100644
index 00000000..ca0d3ac0
--- /dev/null
+++ b/s/SLEPc/SLEPc-3.12.2-intel-2020a.eb
@@ -0,0 +1,23 @@
+# IT4Innovations 2020
+
+name = 'SLEPc'
+version = '3.12.2'
+
+homepage = 'https://slepc.upv.es/'
+description = """SLEPc (Scalable Library for Eigenvalue Problem Computations) is a software library for the solution
+ of large scale sparse eigenvalue problems on parallel computers. It is an extension of PETSc and can be used for
+ either standard or generalized eigenproblems, with real or complex arithmetic. It can also be used for computing a
+ partial SVD of a large, sparse, rectangular matrix, and to solve quadratic eigenvalue problems."""
+
+toolchain = {'name': 'intel', 'version': '2020a'}
+toolchainopts = {'usempi': True, 'openmp': True}
+
+source_urls = ['https://slepc.upv.es/download/distrib']
+sources = [SOURCELOWER_TAR_GZ]
+checksums = ['a586ce572a928ed87f04961850992a9b8e741677397cbaa3fb028323eddf4598']
+
+dependencies = [('PETSc', '3.12.4')]
+
+petsc_arch = 'installed-arch-linux2-c-opt'
+
+moduleclass = 'numlib'
diff --git a/s/scipy/scipy-1.4.1-Py-3.7.eb b/s/scipy/scipy-1.4.1-Py-3.7.eb
new file mode 100644
index 00000000..1303e118
--- /dev/null
+++ b/s/scipy/scipy-1.4.1-Py-3.7.eb
@@ -0,0 +1,33 @@
+# IT4Innovations 2020
+
+easyblock = 'PythonPackage'
+
+name = 'scipy'
+version = '1.4.1'
+
+homepage = 'http://scipy.org'
+description = """SciPy (pronounced 'Sigh Pie') is open-source software for mathematics, science, and engineering.
+  It includes modules for statistics, optimization, integration, linear algebra, Fourier transforms, signal and
+  image processing, ODE solvers, and more."""
+
+toolchain = {'name': 'Py', 'version': '3.7'}
+toolchainopts = {'pic': True}
+
+source_urls = [PYPI_SOURCE]
+sources = [SOURCELOWER_TAR_GZ]
+
+dependencies = [
+    ('numpy', '1.18.1'),
+    ('pybind11', '2.4.3'),
+    ('mkl', '2019.5.281', '', True),
+]
+
+prebuildopts = 'unset LDFLAGS && '
+
+sanity_check_paths = {'files': [], 'dirs': [
+    'lib/python3.7/site-packages/%(name)s-%(version)s-py3.7-linux-x86_64.egg/scipy'], }
+
+sanity_check_commands = [
+    ('python', '-c "import scipy; assert(scipy.__version__ == \'%(version)s\')"')]
+
+moduleclass = 'python'
diff --git a/s/slepc4py/slepc4py-3.12.0-Py-3.7.eb b/s/slepc4py/slepc4py-3.12.0-Py-3.7.eb
index dbce9ab0..1ca7e8f4 100644
--- a/s/slepc4py/slepc4py-3.12.0-Py-3.7.eb
+++ b/s/slepc4py/slepc4py-3.12.0-Py-3.7.eb
@@ -12,13 +12,14 @@ toolchain = {'name': 'Py', 'version': '3.7'}
 source_urls = [PYPI_SOURCE]
 sources = [SOURCE_TAR_GZ]
 
-#dependencies = [
-#    ('MarkupSafe', '1.0'),
-#]
+dependencies = [
+    ('SLEPc', '3.12.2', '', ('intel', '2020a')),
+    ('petsc4py', '3.12.0'),
+]
 
 sanity_check_paths = {
     'files': [],
-    'dirs': ['lib/python3.7/site-packages/%(name)s-%(version)s-py3.7.egg'],
+    'dirs': ['lib/python3.7/site-packages/%(name)s'],
 }
 
 moduleclass = 'python'