diff --git a/nmigen/_yosys.py b/nmigen/_yosys.py
index dcade81..0d1dd7f 100644
--- a/nmigen/_yosys.py
+++ b/nmigen/_yosys.py
@@ -181,5 +181,5 @@ def find_yosys(requirement):
             raise YosysError("Could not find an acceptable Yosys binary. Searched: {}"
                              .format(", ".join(clauses)))
         else:
-            raise YosysError("Could not find an acceptable Yosys binary. The `nmigen_yosys` PyPI "
+            raise YosysError("Could not find an acceptable Yosys binary. The `nmigen-yosys` PyPI "
                              "package, if available for this platform, can be used as fallback")