diff --git a/src/pip/_internal/commands/install.py b/src/pip/_internal/commands/install.py
index 70acf202be9..232a34a6d3e 100644
--- a/src/pip/_internal/commands/install.py
+++ b/src/pip/_internal/commands/install.py
@@ -433,7 +433,7 @@ def run(self, options: Values, args: List[str]) -> int:
 
             if build_failures:
                 raise InstallationError(
-                    "ERROR: Failed to build installable wheels for some "
+                    "Failed to build installable wheels for some "
                     "pyproject.toml based projects ({})".format(
                         ", ".join(r.name for r in build_failures)  # type: ignore
                     )