diff --git a/pkgs/development/python-modules/boto3/default.nix b/pkgs/development/python-modules/boto3/default.nix
index 1d3e0cca6749..cfc222d2d2a1 100644
--- a/pkgs/development/python-modules/boto3/default.nix
+++ b/pkgs/development/python-modules/boto3/default.nix
@@ -12,7 +12,7 @@
 }:
 
 buildPythonPackage rec {
-  pname =  "boto3";
+  pname = "boto3";
   version = "1.17.5"; # N.B: if you change this, change botocore too
 
   src = fetchPypi {