diff --git a/pkgs/os-specific/linux/microcode/amd.nix b/pkgs/os-specific/linux/microcode/amd.nix
index 3c82cdec29fb..1171da4cdd61 100644
--- a/pkgs/os-specific/linux/microcode/amd.nix
+++ b/pkgs/os-specific/linux/microcode/amd.nix
@@ -26,6 +26,9 @@ stdenv.mkDerivation {
     description = "AMD Processor microcode patch";
     homepage = "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git";
     license = licenses.unfreeRedistributableFirmware;
-    platforms = platforms.linux;
+    platforms = [
+      "i686-linux"
+      "x86_64-linux"
+    ];
   };
 }
diff --git a/pkgs/os-specific/linux/microcode/intel.nix b/pkgs/os-specific/linux/microcode/intel.nix
index 7dc26d481adc..e46ac5225e0e 100644
--- a/pkgs/os-specific/linux/microcode/intel.nix
+++ b/pkgs/os-specific/linux/microcode/intel.nix
@@ -29,7 +29,10 @@ stdenv.mkDerivation rec {
     changelog = "https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/releases/tag/${src.rev}";
     description = "Microcode for Intel processors";
     license = licenses.unfreeRedistributableFirmware;
-    platforms = platforms.linux;
+    platforms = [
+      "i686-linux"
+      "x86_64-linux"
+    ];
     maintainers = with maintainers; [ felixsinger ];
   };
 }