3 files changed, 7 insertions, 4 deletions
diff --git a/pkgs/applications/science/misc/gephi/default.nix b/pkgs/applications/science/misc/gephi/default.nix
index b81f188a91bf..17b2fe27f297 100644
--- a/pkgs/applications/science/misc/gephi/default.nix
+++ b/pkgs/applications/science/misc/gephi/default.nix
@@ -28,7 +28,8 @@ let
   };
 in
 stdenv.mkDerivation rec {
-  name = "gephi-${version}";
+  pname = "gephi";
+  inherit version;
 
   inherit src;
 
diff --git a/pkgs/applications/science/misc/megam/default.nix b/pkgs/applications/science/misc/megam/default.nix
index 8cd119c7b7b0..59f5afb2f437 100644
--- a/pkgs/applications/science/misc/megam/default.nix
+++ b/pkgs/applications/science/misc/megam/default.nix
@@ -2,7 +2,8 @@
 
 let version = "0.92"; in
 stdenv.mkDerivation rec {
-  name = "megam-${version}";
+  pname = "megam";
+  inherit version;
 
   src = fetchurl {
     url = "http://hal3.name/megam/megam_src.tgz";
diff --git a/pkgs/applications/science/misc/tulip/default.nix b/pkgs/applications/science/misc/tulip/default.nix
index 7db2e6a12c20..82e3136b8f04 100644
--- a/pkgs/applications/science/misc/tulip/default.nix
+++ b/pkgs/applications/science/misc/tulip/default.nix
@@ -3,10 +3,11 @@
 
 let version = "5.1.0"; in
 stdenv.mkDerivation rec {
-  name = "tulip-${version}";
+  pname = "tulip";
+  inherit version;
 
   src = fetchurl {
-    url = "mirror://sourceforge/auber/${name}_src.tar.gz";
+    url = "mirror://sourceforge/auber/${pname}-${version}_src.tar.gz";
     sha256 = "1i70y8b39gkpxfalr9844pa3l4bnnyw5y7ngxdqibil96k2b9q9h";
   };