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diff --git a/3 Resources/Nix/Apply custom patches.md b/3 Resources/Nix/Apply custom patches.md
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+#nix #packages #overlay
+
+---
+We can apply patches to existing packages using [[Overlays]]:
+```nix
+final: prev {
+  nova = prev.nova.overrideAttrs (old: {
+	  patches = (old.patches or []) ++ [
+		  prev.fetchpatch {
+			url = "https://github.com/owner/repo/commit/hash.patch";
+		    hash = "somehash";
+		})
+		./relative.patch
+	  ]
+  })
+}
+```