diff --git a/Makefile b/Makefile
index 45545c8..94606a4 100644
--- a/Makefile
+++ b/Makefile
@@ -18,29 +18,35 @@ build: build.stamp
 
 venv: venv/touchfile
 
-build.stamp: venv .init.stamp sources/config.yaml $(SOURCES)
+venv-test: venv-test/touchfile
+
+customize: venv
+	. venv/bin/activate; python3 scripts/customize.py
+
+build.stamp: venv sources/config.yaml $(SOURCES)
 	rm -rf fonts
 	(for config in sources/config*.yaml; do . venv/bin/activate; gftools builder $$config; done)  && touch build.stamp
 
-.init.stamp: venv
-	. venv/bin/activate; python3 scripts/first-run.py
-
 venv/touchfile: requirements.txt
 	test -d venv || python3 -m venv venv
 	. venv/bin/activate; pip install -Ur requirements.txt
 	touch venv/touchfile
 
-test: venv build.stamp
-	. venv/bin/activate; mkdir -p out/ out/fontbakery; fontbakery check-googlefonts -l WARN --full-lists --succinct --badges out/badges --html out/fontbakery/fontbakery-report.html --ghmarkdown out/fontbakery/fontbakery-report.md $(shell find fonts/ttf -type f)  || echo '::warning file=sources/config.yaml,title=Fontbakery failures::The fontbakery QA check reported errors in your font. Please check the generated report.'
+venv-test/touchfile: requirements-test.txt
+	test -d venv-test || python3 -m venv venv-test
+	. venv-test/bin/activate; pip install -Ur requirements-test.txt
+	touch venv-test/touchfile
+
+test: venv-test build.stamp
+	. venv-test/bin/activate; mkdir -p out/ out/fontbakery; fontbakery check-googlefonts -l WARN --full-lists --succinct --badges out/badges --html out/fontbakery/fontbakery-report.html --ghmarkdown out/fontbakery/fontbakery-report.md $(shell find fonts/ttf -type f)  || echo '::warning file=sources/config.yaml,title=Fontbakery failures::The fontbakery QA check reported errors in your font. Please check the generated report.'
 
 proof: venv build.stamp
 	. venv/bin/activate; mkdir -p out/ out/proof; diffenator2 proof $(shell find fonts/ttf -type f) -o out/proof
 
-images: venv build.stamp $(DRAWBOT_OUTPUT)
-	git add documentation/*.png && git commit -m "Rebuild images" documentation/*.png
+images: venv $(DRAWBOT_OUTPUT)
 
 %.png: %.py build.stamp
-	python3 $< --output $@
+	. venv/bin/activate; python3 $< --output $@
 
 clean:
 	rm -rf venv
diff --git a/requirements-test.txt b/requirements-test.txt
new file mode 100644
index 0000000..d326066
--- /dev/null
+++ b/requirements-test.txt
@@ -0,0 +1,2 @@
+fontbakery[googlefonts]>=0.9.2
+gftools[qa]>=0.9.23
diff --git a/requirements.txt b/requirements.txt
index ead5442..89e58c4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,111 +1,10 @@
-absl-py==2.0.0
-appdirs==1.4.4
-attrs==23.1.0
-axisregistry==0.4.3
-babelfont==3.0.1
-beziers==0.5.0
-blackrenderer==0.6.0
-booleanOperations==0.9.0
-Brotli==1.1.0
-bump2version==1.0.1
-bumpfontversion==0.4.1
-cattrs==23.1.2
-certifi==2023.7.22
-cffi==1.16.0
-cffsubr==0.2.9.post1
-charset-normalizer==3.2.0
-click==8.1.7
-cmarkgfm==2022.10.27
-colorlog==6.7.0
-compreffor==0.5.5
-cryptography==41.0.4
-cu2qu==1.6.7.post2
-defcon==0.10.3
-Deprecated==1.2.14
-diffenator2==0.2.13
-drawbot-skia==0.5.0
-exceptiongroup==1.1.3
-font-v==2.1.0
-fontbakery==0.9.2
-fontFeatures==1.8.0
-fontmake==3.7.1
-fontMath==0.9.3
-fonttools==4.42.1
-freetype-py==2.3.0
-fs==2.4.16
-gflanguages==0.5.7
-gftools==0.9.34
-gitdb==4.0.10
-GitPython==3.1.37
-glyphsets==0.6.4
-glyphsLib==6.4.0
-h11==0.14.0
-hyperglot==0.4.5
-idna==3.4
-Jinja2==3.1.2
-lxml==4.9.3
-markdown-it-py==3.0.0
-MarkupSafe==2.1.3
-mdurl==0.1.2
-munkres==1.1.4
-nanoemoji==0.15.1
-ninja==1.11.1
-numpy==1.26.0
-openstep-plist==0.3.1
-opentype-sanitizer==9.1.0
-opentypespec==1.9.1
-orjson==3.9.7
-outcome==1.2.0
-packaging==23.1
-picosvg==0.22.1
-Pillow==10.0.1
-pip-api==0.0.30
-pngquant-cli==2.17.0.post5
-protobuf==3.20.3
-pyahocorasick==2.0.0
-pybind11==2.11.1
-pyclipper==1.3.0.post5
-pycparser==2.21
-pygit2==1.13.1
-PyGithub==1.59.1
-Pygments==2.16.1
-PyJWT==2.8.0
-PyNaCl==1.5.0
-pyparsing==3.1.1
-PySocks==1.7.1
-python-bidi==0.4.2
-python-dateutil==2.8.2
-PyYAML==6.0.1
-regex==2023.8.8
-requests==2.31.0
-resvg-cli==0.22.0.post3
-rich==13.5.3
-selenium==4.13.0
-sh==2.0.6
-six==1.16.0
-skia-pathops==0.8.0.post1
-skia-python==87.5
-smmap==5.0.1
-sniffio==1.3.0
-sortedcontainers==2.4.0
-statmake==0.6.0
-strictyaml==1.7.3
-tabulate==0.9.0
-toml==0.10.2
-tqdm==4.66.1
-trio==0.22.2
-trio-websocket==0.11.1
-ttfautohint-py==0.5.1
-typing_extensions==4.8.0
-ufo2ft==2.33.4
-ufoLib2==0.16.0
-uharfbuzz==0.37.3
-unicodedata2==15.1.0
-Unidecode==1.3.7
-urllib3==2.0.5
-vharfbuzz==0.2.0
-vttLib==0.12.0
-wrapt==1.15.0
-wsproto==1.2.0
-youseedee==0.3.0
-zopfli==0.2.3
+fontmake>=2.4
+fontbakery>=0.8.11
+gftools @ git+https://github.com/googlefonts/gftools@builder2
+fontprimer @ git+https://github.com/simoncozens/fontprimer
+gftools[qa]>=0.9.23
+drawbot-skia>=0.4.8
+sh>=1.14.2
+bumpfontversion>=0.2.0
+diffenator2>=0.2.5
+opentype-feature-freezer