Use hatch-autorun instead of coverage-enable-subprocess

pyproject.toml

@@ -50,8 +50,6 @@ tests-no-zope = [
 tests = ["attrs[tests-no-zope]", "zope.interface"]
 cov = [
     "attrs[tests]",
-    # Makes coverage work with pytest-xdist.
-    "coverage-enable-subprocess",
     # Ensure coverage is new enough for `source_pkgs`.
     "coverage>=5.3",
 ]
@@ -115,6 +113,16 @@ text = """
 """
 
 
+# Make coverage play nicely with pytest-xdist.
+[tool.hatch.build.targets.wheel.hooks.autorun]
+dependencies = ["hatch-autorun"]
+code = """
+import coverage
+coverage.process_startup()
+"""
+enable-by-default = false
+
+
 [tool.pytest.ini_options]
 addopts = ["-ra", "--strict-markers", "--strict-config"]
 xfail_strict = true

tox.ini

@@ -31,7 +31,9 @@ commands = python -m pytest {posargs:-n auto}
 
 [testenv:py37]
 extras = cov
-setenv = COVERAGE_PROCESS_START={toxinidir}/pyproject.toml
+setenv =
+    HATCH_BUILD_HOOK_ENABLE_AUTORUN=1
+    COVERAGE_PROCESS_START={toxinidir}/pyproject.toml
 commands = coverage run -m pytest {posargs:-n auto}