diff --git a/Makefile b/Makefile
index fb8c610..d400c61 100644
--- a/Makefile
+++ b/Makefile
@@ -66,7 +66,7 @@ push-release: dist  # pushes distribution tarballs of the current version
 	$(VENV)/bin/twine upload dist/*.tar.gz
 
 build-release:
-	$(VENV)/bin/python setup.py build sdist bdist_wheel
+	$(VENV)/bin/python setup.py build sdist
 	$(VENV)/bin/twine check dist/*.tar.gz
 
 release: tests
diff --git a/setup.cfg b/setup.cfg
index 0eea7d1..7aa5aa0 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [tool:pytest]
-addopts = --cov=sure --ignore tests/crashes -v --capture=no --disable-warnings
+addopts = --cov=sure --ignore tests/crashes -v --capture=no --disable-warnings --maxfail=1
 testpaths =
     tests
 filterwarnings =
diff --git a/setup.py b/setup.py
index 5767e33..eac4c70 100644
--- a/setup.py
+++ b/setup.py
@@ -46,24 +46,13 @@
 PROJECT_ROOT = os.path.dirname(__file__)
 
 
-class VersionFinder(ast.NodeVisitor):
-    VARIABLE_NAME = "version"
-
-    def __init__(self):
-        self.version = None
-
-    def visit_Assign(self, node):
-        try:
-            if node.targets[0].id == self.VARIABLE_NAME:
-                self.version = node.value.s
-        except Exception:
-            pass
-
-
 def read_version():
-    finder = VersionFinder()
-    finder.visit(ast.parse(local_text_file("sure", "version.py")))
-    return finder.version
+    mod = ast.parse(local_text_file("sure", "version.py"))
+    exp = mod.body[0]
+    tgt = exp.targets[0]
+    cst = exp.value
+    assert tgt.id == "version"
+    return cst.value
 
 
 def local_text_file(*f):
diff --git a/sure/version.py b/sure/version.py
index 9f8ea32..3477736 100644
--- a/sure/version.py
+++ b/sure/version.py
@@ -1 +1 @@
-version = "3.0a0"
+version = "3.0a1"