diff --git a/.gitignore b/.gitignore
index 34ae94c..8902c69 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,6 +15,7 @@
 /try/
 .ipynb_checkpoints/
 /*.done
+/done/*.done
 *.pyc
 *.pyo
 *.log
diff --git a/Makefile b/Makefile
index 2b49693..a583573 100644
--- a/Makefile
+++ b/Makefile
@@ -244,6 +244,9 @@ dist_included_files := \
     setup.py \
     $(package_name)/*.py \
 
+# Directory for .done files
+done_dir := done
+
 .PHONY: help
 help:
 	@echo "Makefile for $(project_name) project"
@@ -339,7 +342,7 @@ _check_installed:
 	$(PYTHON_CMD) -c "import $(package_name)"
 	@echo "Makefile: Done verifying installation of package $(package_name)"
 
-pip_upgrade_$(pymn).done: Makefile
+$(done_dir)/pip_upgrade_$(pymn)_$(PACKAGE_LEVEL).done: Makefile
 	@echo "Makefile: Installing/upgrading Pip (with PACKAGE_LEVEL=$(PACKAGE_LEVEL))"
 	-$(call RM_FUNC,$@)
 	bash -c 'pv=$$($(PIP_CMD) --version); if [[ $$pv =~ (^pip [1-8]\..*) ]]; then $(PYTHON_CMD) -m pip $(pip_opts) install pip==9.0.1; fi'
@@ -347,21 +350,21 @@ pip_upgrade_$(pymn).done: Makefile
 	echo "done" >$@
 	@echo "Makefile: Done installing/upgrading Pip"
 
-install_basic_$(pymn).done: Makefile pip_upgrade_$(pymn).done
+$(done_dir)/install_basic_$(pymn)_$(PACKAGE_LEVEL).done: Makefile $(done_dir)/pip_upgrade_$(pymn)_$(PACKAGE_LEVEL).done
 	@echo "Makefile: Installing/upgrading basic Python packages (with PACKAGE_LEVEL=$(PACKAGE_LEVEL))"
 	-$(call RM_FUNC,$@)
 	$(PIP_CMD_MOD) $(pip_opts) install $(pip_level_opts) setuptools wheel
 	echo "done" >$@
 	@echo "Makefile: Done installing/upgrading basic Python packages"
 
-install_reqs_$(pymn).done: Makefile install_basic_$(pymn).done requirements.txt
+$(done_dir)/install_reqs_$(pymn)_$(PACKAGE_LEVEL).done: Makefile $(done_dir)/install_basic_$(pymn)_$(PACKAGE_LEVEL).done requirements.txt
 	@echo "Makefile: Installing Python installation prerequisites (with PACKAGE_LEVEL=$(PACKAGE_LEVEL))"
 	-$(call RM_FUNC,$@)
 	$(PIP_CMD_MOD) $(pip_opts) install $(pip_level_opts) -r requirements.txt
 	echo "done" >$@
 	@echo "Makefile: Done installing Python installation prerequisites"
 
-develop_reqs_$(pymn).done: install_basic_$(pymn).done dev-requirements.txt test-requirements.txt
+$(done_dir)/develop_reqs_$(pymn)_$(PACKAGE_LEVEL).done: $(done_dir)/install_basic_$(pymn)_$(PACKAGE_LEVEL).done dev-requirements.txt test-requirements.txt
 	@echo "Makefile: Installing development requirements (with PACKAGE_LEVEL=$(PACKAGE_LEVEL))"
 	-$(call RM_FUNC,$@)
 	$(PIP_CMD_MOD) $(pip_opts) install $(pip_level_opts) -r dev-requirements.txt
@@ -369,7 +372,7 @@ develop_reqs_$(pymn).done: install_basic_$(pymn).done dev-requirements.txt test-
 	@echo "Makefile: Done installing development requirements"
 
 .PHONY: install
-install: Makefile install_reqs_$(pymn).done setup.py
+install: Makefile $(done_dir)/install_reqs_$(pymn)_$(PACKAGE_LEVEL).done setup.py
 ifdef TEST_INSTALLED
 	@echo "Makefile: Skipping installation of package $(package_name) as standalone because TEST_INSTALLED is set"
 	@echo "Makefile: Checking whether package $(package_name) is actually installed:"
@@ -390,7 +393,7 @@ endif
 	@echo "Makefile: Target $@ done."
 
 .PHONY: develop
-develop: Makefile install_reqs_$(pymn).done develop_reqs_$(pymn).done setup.py
+develop: Makefile $(done_dir)/install_reqs_$(pymn)_$(PACKAGE_LEVEL).done $(done_dir)/develop_reqs_$(pymn)_$(PACKAGE_LEVEL).done setup.py
 ifdef TEST_INSTALLED
 	@echo "Makefile: Skipping installation of package $(package_name) as editable because TEST_INSTALLED is set"
 	@echo "Makefile: Checking whether package $(package_name) is actually installed:"
@@ -419,19 +422,19 @@ builddoc: html
 	@echo "Makefile: Target $@ done."
 
 .PHONY: check
-check: flake8_$(pymn).done
+check: $(done_dir)/flake8_$(pymn)_$(PACKAGE_LEVEL).done
 	@echo "Makefile: Target $@ done."
 
 .PHONY: safety
-safety: safety_$(pymn).done
+safety: $(done_dir)/safety_$(pymn)_$(PACKAGE_LEVEL).done
 	@echo "Makefile: Target $@ done."
 
 .PHONY: pylint
-pylint: pylint_$(pymn).done
+pylint: $(done_dir)/pylint_$(pymn)_$(PACKAGE_LEVEL).done
 	@echo "Makefile: Target $@ done."
 
 .PHONY: mypy
-mypy: mypy_$(pymn).done
+mypy: $(done_dir)/mypy_$(pymn)_$(PACKAGE_LEVEL).done
 	@echo "Makefile: Target $@ done."
 
 .PHONY: all
@@ -468,7 +471,7 @@ upload: _check_version $(dist_files)
 	@echo "Makefile: Target $@ done."
 
 .PHONY: html
-html: develop_reqs_$(pymn).done $(doc_build_dir)/html/docs/index.html
+html: $(done_dir)/develop_reqs_$(pymn)_$(PACKAGE_LEVEL).done $(doc_build_dir)/html/docs/index.html
 	@echo "Makefile: Target $@ done."
 
 $(doc_build_dir)/html/docs/index.html: Makefile $(doc_dependent_files)
@@ -478,7 +481,7 @@ $(doc_build_dir)/html/docs/index.html: Makefile $(doc_dependent_files)
 	@echo "Makefile: Done creating the documentation as HTML pages; top level file: $@"
 
 .PHONY: pdf
-pdf: develop_reqs_$(pymn).done Makefile $(doc_dependent_files)
+pdf: $(done_dir)/develop_reqs_$(pymn)_$(PACKAGE_LEVEL).done Makefile $(doc_dependent_files)
 	@echo "Makefile: Creating the documentation as PDF file"
 	-$(call RM_FUNC,$@)
 	$(doc_cmd) -b latex $(doc_opts) $(doc_build_dir)/pdf
@@ -488,7 +491,7 @@ pdf: develop_reqs_$(pymn).done Makefile $(doc_dependent_files)
 	@echo "Makefile: Target $@ done."
 
 .PHONY: man
-man: develop_reqs_$(pymn).done Makefile $(doc_dependent_files)
+man: $(done_dir)/develop_reqs_$(pymn)_$(PACKAGE_LEVEL).done Makefile $(doc_dependent_files)
 	@echo "Makefile: Creating the documentation as man pages"
 	-$(call RM_FUNC,$@)
 	$(doc_cmd) -b man $(doc_opts) $(doc_build_dir)/man
@@ -496,7 +499,7 @@ man: develop_reqs_$(pymn).done Makefile $(doc_dependent_files)
 	@echo "Makefile: Target $@ done."
 
 .PHONY: docchanges
-docchanges: develop_reqs_$(pymn).done
+docchanges: $(done_dir)/develop_reqs_$(pymn)_$(PACKAGE_LEVEL).done
 	@echo "Makefile: Creating the doc changes overview file"
 	$(doc_cmd) -b changes $(doc_opts) $(doc_build_dir)/changes
 	@echo
@@ -504,7 +507,7 @@ docchanges: develop_reqs_$(pymn).done
 	@echo "Makefile: Target $@ done."
 
 .PHONY: doclinkcheck
-doclinkcheck: develop_reqs_$(pymn).done
+doclinkcheck: $(done_dir)/develop_reqs_$(pymn)_$(PACKAGE_LEVEL).done
 	@echo "Makefile: Creating the doc link errors file"
 	$(doc_cmd) -b linkcheck $(doc_opts) $(doc_build_dir)/linkcheck
 	@echo
@@ -512,7 +515,7 @@ doclinkcheck: develop_reqs_$(pymn).done
 	@echo "Makefile: Target $@ done."
 
 .PHONY: doccoverage
-doccoverage: develop_reqs_$(pymn).done
+doccoverage: $(done_dir)/develop_reqs_$(pymn)_$(PACKAGE_LEVEL).done
 	@echo "Makefile: Creating the doc coverage results file"
 	$(doc_cmd) -b coverage $(doc_opts) $(doc_build_dir)/coverage
 	@echo "Makefile: Done creating the doc coverage results file: $(doc_build_dir)/coverage/python.txt"
@@ -548,7 +551,7 @@ $(bdist_file) $(sdist_file): setup.py MANIFEST.in $(dist_included_files)
 	$(PYTHON_CMD) setup.py sdist -d $(dist_dir) bdist_wheel -d $(dist_dir) --universal
 	@echo "Makefile: Done creating the distribution archive files: $(bdist_file) $(sdist_file)"
 
-pylint_$(pymn).done: develop_reqs_$(pymn).done Makefile $(pylint_rc_file) $(py_src_files)
+$(done_dir)/pylint_$(pymn)_$(PACKAGE_LEVEL).done: $(done_dir)/develop_reqs_$(pymn)_$(PACKAGE_LEVEL).done Makefile $(pylint_rc_file) $(py_src_files)
 	@echo "Makefile: Running Pylint"
 	-$(call RM_FUNC,$@)
 	pylint --version
@@ -556,7 +559,7 @@ pylint_$(pymn).done: develop_reqs_$(pymn).done Makefile $(pylint_rc_file) $(py_s
 	echo "done" >$@
 	@echo "Makefile: Done running Pylint"
 
-mypy_$(pymn).done: develop_reqs_$(pymn).done Makefile $(py_src_files)
+$(done_dir)/mypy_$(pymn)_$(PACKAGE_LEVEL).done: $(done_dir)/develop_reqs_$(pymn)_$(PACKAGE_LEVEL).done Makefile $(py_src_files)
 	@echo "Makefile: Running Mypy"
 	-$(call RM_FUNC,$@)
 	mypy --version
@@ -564,7 +567,7 @@ mypy_$(pymn).done: develop_reqs_$(pymn).done Makefile $(py_src_files)
 	echo "done" >$@
 	@echo "Makefile: Done running Mypy"
 
-flake8_$(pymn).done: develop_reqs_$(pymn).done Makefile $(flake8_rc_file) $(py_src_files)
+$(done_dir)/flake8_$(pymn)_$(PACKAGE_LEVEL).done: $(done_dir)/develop_reqs_$(pymn)_$(PACKAGE_LEVEL).done Makefile $(flake8_rc_file) $(py_src_files)
 	@echo "Makefile: Running Flake8"
 	-$(call RM_FUNC,$@)
 	flake8 --version
@@ -572,7 +575,7 @@ flake8_$(pymn).done: develop_reqs_$(pymn).done Makefile $(flake8_rc_file) $(py_s
 	echo "done" >$@
 	@echo "Makefile: Done running Flake8"
 
-safety_$(pymn).done: develop_reqs_$(pymn).done Makefile $(safety_policy_file) minimum-constraints.txt
+$(done_dir)/safety_$(pymn)_$(PACKAGE_LEVEL).done: $(done_dir)/develop_reqs_$(pymn)_$(PACKAGE_LEVEL).done Makefile $(safety_policy_file) minimum-constraints.txt
 	@echo "Makefile: Running pyup.io safety check"
 	-$(call RM_FUNC,$@)
 	safety check --policy-file $(safety_policy_file) -r minimum-constraints.txt --full-report
diff --git a/done/.dummy b/done/.dummy
new file mode 100644
index 0000000..e69de29