diff --git a/pkgs/applications/science/biology/neuron/default.nix b/pkgs/applications/science/biology/neuron/default.nix
index 71abe614a0c2..b7616e7e7637 100644
--- a/pkgs/applications/science/biology/neuron/default.nix
+++ b/pkgs/applications/science/biology/neuron/default.nix
@@ -35,8 +35,8 @@ stdenv.mkDerivation rec {
     export prefix="''${prefix} --exec-prefix=''${out}" 
   '';
 
-  configureFlags = with stdenv.lib; 
-				   [ "--without-x" "--with-readline=${readline}" ]
+  configureFlags = with stdenv.lib;
+                    [ "--without-x" "--with-readline=${readline}" ]
                     ++  optionals (python != null)  [ "--with-nrnpython=${python.interpreter}" ]
                     ++ (if mpi != null then ["--with-mpi" "--with-paranrn"] 
                         else ["--without-mpi"]);
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index fa60859f251d..f327d17601c7 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -16455,8 +16455,8 @@ in
 
   igv = callPackage ../applications/science/biology/igv { };
 
-  neuron = callPackage ../applications/science/biology/neuron { 
-	python = null;	
+  neuron = callPackage ../applications/science/biology/neuron {
+    python = null;
   };
 
   neuron-mpi = appendToName "mpi" (neuron.override {
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 5aee075b913f..574cff47122a 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -242,11 +242,11 @@ in modules // {
   };
 
   neuron = pkgs.neuron.override {
-	inherit python; 
+    inherit python;
   };
 
   neuron-mpi = pkgs.neuron-mpi.override {
-	inherit python;
+    inherit python;
   };
 
   nixpart = callPackage ../tools/filesystems/nixpart { };