diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 99f7d1e2..4cd02aac 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -6,6 +6,7 @@ on:
   - cron: '2 1 * * 6'  # M H d m w (Saturdays at 1:02)
 jobs:
   check:
+    if: github.event_name != 'pull_request' || github.head_ref != 'devel'
     name: install
     runs-on: ubuntu-latest
     steps:
diff --git a/.meta/mksnap.py b/.meta/mksnap.py
index 5feef0b9..337e46b8 100644
--- a/.meta/mksnap.py
+++ b/.meta/mksnap.py
@@ -2,22 +2,15 @@
 """
 Auto-generate snapcraft.yaml.
 """
-from __future__ import print_function
-from configparser import ConfigParser
 from io import open as io_open
 from os import path
 from subprocess import check_output
-import re
 import sys
 
 sys.path.insert(1, path.dirname(path.dirname(__file__)))
 import tqdm  # NOQA
 
 src_dir = path.abspath(path.dirname(__file__))
-cfg = ConfigParser()
-cfg.read(path.join(path.dirname(src_dir), 'setup.cfg'))
-setup_requires = re.split(
-    r"[;\s]+", str(cfg["options"].get("setup_requires")), flags=re.M)
 snap_yml = r"""name: tqdm
 summary: A fast, extensible CLI progress bar
 description: |
@@ -60,8 +53,7 @@ license: MPL-2.0
 parts:
   tqdm:
     plugin: python
-    python-packages: {setup_requires}
-    python-version: python3
+    python-packages: [disco-py]
     source: .
     source-commit: '{commit}'
     build-packages: [git]
@@ -74,7 +66,6 @@ apps:
     completer: completion.sh
 """.format(
     version=tqdm.__version__,
-    setup_requires=repr(setup_requires),
     commit=check_output(['git', 'describe', '--always']).decode('U8').strip())
 fname = path.join(path.dirname(src_dir), 'snapcraft.yaml')
 
diff --git a/Makefile b/Makefile
index dd196086..82f239da 100644
--- a/Makefile
+++ b/Makefile
@@ -115,13 +115,14 @@ distclean:
 pre-commit:
 	# quick sanity checks
 	@make --no-print-directory testsetup
-	flake8 -j 8 --count --statistics setup.py tqdm/ tests/ examples/
+	flake8 -j 8 --count --statistics setup.py .meta/ tqdm/ tests/ examples/
 	pytest -qq -k "basic_overhead or not (perf or keras or pandas or monitoring)"
 prebuildclean:
 	@+python -c "import shutil; shutil.rmtree('build', True)"
 	@+python -c "import shutil; shutil.rmtree('dist', True)"
 	@+python -c "import shutil; shutil.rmtree('tqdm.egg-info', True)"
 	@+python -c "import shutil; shutil.rmtree('.eggs', True)"
+	@+python -c "import os; os.remove('tqdm/_dist_ver.py') if os.path.exists('tqdm/_dist_ver.py') else None"
 coverclean:
 	@+python -c "import os; os.remove('.coverage') if os.path.exists('.coverage') else None"
 	@+python -c "import os, glob; [os.remove(i) for i in glob.glob('.coverage.*')]"
@@ -170,9 +171,8 @@ snap:
 	@make -B snapcraft.yaml
 	snapcraft
 docker:
+	@make build
 	@make .dockerignore
-	@make coverclean
-	@make clean
 	docker build . -t tqdm/tqdm
 	docker tag tqdm/tqdm:latest tqdm/tqdm:$(shell docker run -i --rm tqdm/tqdm -v)
 none:
diff --git a/pyproject.toml b/pyproject.toml
index c2f3f1b9..3eb7bbcf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=38.6.0", "setuptools_scm"]
+requires = ["setuptools>=42", "wheel", "setuptools_scm[toml]>=3.4"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools_scm]
diff --git a/requirements-dev.txt b/requirements-dev.txt
index f19dbe0c..f7882f50 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,4 +3,3 @@ twine           # pymake pypi
 argopt          # cd wiki && pymake
 pydoc-markdown  # cd docs && pymake
 wheel           # setup.py bdist_wheel
-setuptools_scm  # version
diff --git a/setup.cfg b/setup.cfg
index be184f1c..79f44adf 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -4,7 +4,7 @@ universal = 1
 [flake8]
 ignore = W503,W504,E722
 max_line_length = 80
-exclude = .asv,.tox,.ipynb_checkpoints,build,dist,.git,__pycache__
+exclude = .asv,.eggs,.tox,.ipynb_checkpoints,build,dist,.git,__pycache__
 
 [tool:pytest]
 python_files = tests_*.py
@@ -90,7 +90,7 @@ classifiers =
     Topic :: Utilities
 
 [options]
-setup_requires = setuptools>=38.6.0; setuptools_scm
+setup_requires = setuptools>=42; setuptools_scm[toml]>=3.4
 python_requires = >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*
 tests_require = pytest; flake8; coverage
 include_package_data = True