diff --git a/pygsti/circuits/circuit.py b/pygsti/circuits/circuit.py
index f6c2e2043..7095b31dc 100644
--- a/pygsti/circuits/circuit.py
+++ b/pygsti/circuits/circuit.py
@@ -4309,7 +4309,7 @@ def convert_to_openqasm(self, num_qubits=None,
                     if openqasmlist_for_gate is None:
                         # Try to look up the operation in mapping dict instead
                         openqasmfn_for_gate = gateargs_map.get(gate.name, None)
-                        assert openqasmfn_for_gate is not None, "Could not look up {} as qasm list or func" % gate.name
+                        assert openqasmfn_for_gate is not None, "Could not look up {0} as qasm list or func".format(gate.name)
                         openqasmlist_for_gate = openqasmfn_for_gate(gate.args)
 
                     openqasm_for_gate = ''
diff --git a/pyproject.toml b/pyproject.toml
index 2d42263b4..10f00cd9d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -97,5 +97,6 @@ Repository = 'https://github.com/sandialabs/pyGSTi'
 Download ='https://github.com/sandialabs/pyGSTi/tarball/master'
 
 [tool.setuptools_scm]
+version_file = "pygsti/_version.py"
 version_scheme = "only-version"
 local_scheme = "no-local-version"
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