diff --git a/pkgs/applications/science/biology/niftyseg/default.nix b/pkgs/applications/science/biology/niftyseg/default.nix
index 689d3e42c979..f70054e97716 100644
--- a/pkgs/applications/science/biology/niftyseg/default.nix
+++ b/pkgs/applications/science/biology/niftyseg/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
     homepage = http://cmictig.cs.ucl.ac.uk/research/software/software-nifty/niftyseg;
     description = "Software for medical image segmentation, bias field correction, and cortical thickness calculation";
     maintainers = with maintainers; [ bcdarwin ];
-    platforms = platforms.linux;
+    platforms = platforms.unix;
     license   = licenses.bsd3;
   };
 
diff --git a/pkgs/development/libraries/science/biology/nifticlib/default.nix b/pkgs/development/libraries/science/biology/nifticlib/default.nix
index 51eed36312dd..8c7da7968f5c 100644
--- a/pkgs/development/libraries/science/biology/nifticlib/default.nix
+++ b/pkgs/development/libraries/science/biology/nifticlib/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     homepage = https://sourceforge.net/projects/niftilib;
     description = "Medical imaging format C API";
     maintainers = with maintainers; [ bcdarwin ];
-    platforms = platforms.linux;
+    platforms = platforms.unix;
     license = licenses.publicDomain;
   };
 }