diff --git a/pkgs/applications/audio/ssrc/default.nix b/pkgs/applications/audio/ssrc/default.nix
index 3516c6e4db0c..1ac1d6658f8d 100644
--- a/pkgs/applications/audio/ssrc/default.nix
+++ b/pkgs/applications/audio/ssrc/default.nix
@@ -36,6 +36,6 @@ stdenv.mkDerivation rec {
     homepage = "http://shibatch.sourceforge.net/";
     license = licenses.gpl2;
     maintainers = with maintainers; [ leenaars];
-    platforms = with platforms; [ linux ] ;
+    platforms = platforms.linux;
   };
 }
diff --git a/pkgs/applications/misc/masterpdfeditor/default.nix b/pkgs/applications/misc/masterpdfeditor/default.nix
index de131b7ce63f..5916179d772c 100644
--- a/pkgs/applications/misc/masterpdfeditor/default.nix
+++ b/pkgs/applications/misc/masterpdfeditor/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
     homepage = "https://code-industry.net/free-pdf-editor/";
     sourceProvenance = with sourceTypes; [ binaryNativeCode ];
     license = licenses.unfreeRedistributable;
-    platforms = with platforms; [ "x86_64-linux" ];
+    platforms = [ "x86_64-linux" ];
     maintainers = with maintainers; [ cmcdragonkai ];
   };
 }
diff --git a/pkgs/applications/misc/masterpdfeditor4/default.nix b/pkgs/applications/misc/masterpdfeditor4/default.nix
index befb11a0a48b..355c23d3d187 100644
--- a/pkgs/applications/misc/masterpdfeditor4/default.nix
+++ b/pkgs/applications/misc/masterpdfeditor4/default.nix
@@ -39,6 +39,6 @@ stdenv.mkDerivation rec {
     homepage = "https://code-industry.net/free-pdf-editor/";
     sourceProvenance = with sourceTypes; [ binaryNativeCode ];
     license = licenses.unfreeRedistributable;
-    platforms = with platforms; [ "x86_64-linux" ];
+    platforms = [ "x86_64-linux" ];
   };
 }
diff --git a/pkgs/applications/radio/welle-io/default.nix b/pkgs/applications/radio/welle-io/default.nix
index fbc7eae9109d..fcb35bd66a49 100644
--- a/pkgs/applications/radio/welle-io/default.nix
+++ b/pkgs/applications/radio/welle-io/default.nix
@@ -41,6 +41,6 @@ mkDerivation rec {
     homepage = "https://www.welle.io/";
     maintainers = with maintainers; [ ck3d markuskowa ];
     license = licenses.gpl2Only;
-    platforms = with platforms; [ "x86_64-linux" "i686-linux" ] ++ darwin;
+    platforms = [ "x86_64-linux" "i686-linux" ] ++ platforms.darwin;
   };
 }
diff --git a/pkgs/applications/science/biology/spades/default.nix b/pkgs/applications/science/biology/spades/default.nix
index 5302b43bb026..9780c8a99a46 100644
--- a/pkgs/applications/science/biology/spades/default.nix
+++ b/pkgs/applications/science/biology/spades/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     description = "St. Petersburg genome assembler: assembly toolkit containing various assembly pipelines";
     license = licenses.gpl2Only;
     homepage = "http://cab.spbu.ru/software/spades/";
-    platforms = with platforms; [ "x86_64-linux" "x86_64-darwin"];
+    platforms = [ "x86_64-linux" "x86_64-darwin" ];
     maintainers = [ maintainers.bzizou ];
   };
 }
diff --git a/pkgs/development/compilers/bupc/default.nix b/pkgs/development/compilers/bupc/default.nix
index 07395ed5ae12..e8b6e5debb4e 100644
--- a/pkgs/development/compilers/bupc/default.nix
+++ b/pkgs/development/compilers/bupc/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
     '';
     homepage = "https://upc.lbl.gov/";
     license = licenses.mit;
-    platforms = with platforms; [ linux ];
+    platforms = platforms.linux;
     maintainers = with maintainers; [ zimbatm ];
   };
 }
diff --git a/pkgs/development/compilers/dale/default.nix b/pkgs/development/compilers/dale/default.nix
index bf02d623e525..0e4baf3ce57e 100644
--- a/pkgs/development/compilers/dale/default.nix
+++ b/pkgs/development/compilers/dale/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation {
     homepage = "https://github.com/tomhrr/dale";
     license = licenses.bsd3;
     maintainers = with maintainers; [ amiloradovsky ];
-    platforms = with platforms; [ "i686-linux" "x86_64-linux" ];
+    platforms = [ "i686-linux" "x86_64-linux" ];
     # failed on Darwin: linker couldn't find the FFI lib
     # failed on AArch64: because LLVM 3.5 is failed there
   };
diff --git a/pkgs/development/compilers/gnatboot/default.nix b/pkgs/development/compilers/gnatboot/default.nix
index b7fb8463d9cb..d7a7e981e086 100644
--- a/pkgs/development/compilers/gnatboot/default.nix
+++ b/pkgs/development/compilers/gnatboot/default.nix
@@ -46,6 +46,6 @@ stdenv.mkDerivation rec {
     homepage = "https://www.gnu.org/software/gnat";
     license = licenses.gpl3;
     maintainers = with maintainers; [ ethindp ];
-    platforms = with platforms; [ "x86_64-linux" ];
+    platforms = [ "x86_64-linux" ];
   };
 }
diff --git a/pkgs/development/libraries/libwhereami/default.nix b/pkgs/development/libraries/libwhereami/default.nix
index d0dd593a03dd..11950c634861 100644
--- a/pkgs/development/libraries/libwhereami/default.nix
+++ b/pkgs/development/libraries/libwhereami/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
     description = "Library to report hypervisor information from inside a VM";
     license = licenses.asl20;
     maintainers = [ maintainers.womfoo ];
-    platforms = with platforms; [ "i686-linux" "x86_64-linux" "x86_64-darwin" ]; # fails on aarch64
+    platforms = [ "i686-linux" "x86_64-linux" "x86_64-darwin" ]; # fails on aarch64
   };
 
 }
diff --git a/pkgs/games/keeperrl/default.nix b/pkgs/games/keeperrl/default.nix
index a1ead9a3f9cf..f1c0f1712629 100644
--- a/pkgs/games/keeperrl/default.nix
+++ b/pkgs/games/keeperrl/default.nix
@@ -70,6 +70,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl2;
     maintainers = with maintainers; [ ];
     # TODO: Add OS X
-    platforms = with platforms; [ "i686-linux" "x86_64-linux" ];
+    platforms = [ "i686-linux" "x86_64-linux" ];
   };
 }
diff --git a/pkgs/games/tome4/default.nix b/pkgs/games/tome4/default.nix
index b732777ed3a8..704d09d72de9 100644
--- a/pkgs/games/tome4/default.nix
+++ b/pkgs/games/tome4/default.nix
@@ -71,6 +71,6 @@ stdenv.mkDerivation rec {
     homepage = "https://te4.org/";
     license = licenses.gpl3;
     maintainers = with maintainers; [ peterhoeg ];
-    platforms = with platforms; [ "i686-linux" "x86_64-linux" ];
+    platforms = [ "i686-linux" "x86_64-linux" ];
   };
 }
diff --git a/pkgs/tools/security/b2sum/default.nix b/pkgs/tools/security/b2sum/default.nix
index bf415e7554e6..e5de613bee7f 100644
--- a/pkgs/tools/security/b2sum/default.nix
+++ b/pkgs/tools/security/b2sum/default.nix
@@ -26,6 +26,6 @@ stdenv.mkDerivation {
     license = with licenses; [ asl20 cc0 openssl ];
     maintainers = with maintainers; [ kirelagin ];
     # "This code requires at least SSE2."
-    platforms = with platforms; [ "x86_64-linux" "i686-linux" ] ++ darwin;
+    platforms = [ "x86_64-linux" "i686-linux" ] ++ platforms.darwin;
   };
 }