diff --git a/pkgs/development/interpreters/hy/default.nix b/pkgs/development/interpreters/hy/default.nix
index ee6ac6d39e5..e1ce01b5906 100644
--- a/pkgs/development/interpreters/hy/default.nix
+++ b/pkgs/development/interpreters/hy/default.nix
@@ -16,7 +16,7 @@ pythonPackages.buildPythonApplication rec {
     description = "A LISP dialect embedded in Python";
     homepage = http://hylang.org/;
     license = stdenv.lib.licenses.mit;
-    maintainers = stdenv.lib.maintainers.nixy; 
+    maintainers = [ stdenv.lib.maintainers.nixy ];
     platforms = stdenv.lib.platforms.all;
   };
 }
diff --git a/pkgs/development/python-modules/flask-wtf.nix b/pkgs/development/python-modules/flask-wtf.nix
index f8f94736680..24e66ea4e98 100644
--- a/pkgs/development/python-modules/flask-wtf.nix
+++ b/pkgs/development/python-modules/flask-wtf.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   meta = with stdenv.lib; {
     description = "Simple integration of Flask and WTForms.";
-    license = licenses.bsd;
+    license = licenses.bsd3;
     maintainers = [ maintainers.mic92 ];
     homepage = https://github.com/lepture/flask-wtf/;
   };
diff --git a/pkgs/development/python-modules/ghdiff.nix b/pkgs/development/python-modules/ghdiff.nix
index 156d9f23729..1f14b661d53 100644
--- a/pkgs/development/python-modules/ghdiff.nix
+++ b/pkgs/development/python-modules/ghdiff.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   meta = with stdenv.lib; {
     homepage =  https://github.com/kilink/ghdiff;
-    license = license.mit;
+    license = licenses.mit;
     description = "Generate Github-style HTML for unified diffs.";
     maintainers = [ maintainers.mic92 ];
   };
diff --git a/pkgs/development/python-modules/twill/default.nix b/pkgs/development/python-modules/twill/default.nix
index 6d4e3cbf1df..f3e7bb7025b 100644
--- a/pkgs/development/python-modules/twill/default.nix
+++ b/pkgs/development/python-modules/twill/default.nix
@@ -18,6 +18,6 @@ buildPythonPackage rec {
     description = "a simple scripting language for Web browsing";
     license     = licenses.mit;
     platforms = platforms.all;
-    maintainers = with maintainers; [ Mic92 ];
+    maintainers = with maintainers; [ mic92 ];
   };
 }