uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/tools/database/pg_checksums/default.nix

@@ -0,0 +1,38 @@
+{ lib, stdenv, fetchFromGitHub, libxslt, docbook_xsl, postgresql }:
+
+stdenv.mkDerivation rec {
+  pname = "pg_checksums";
+  version = "1.1";
+
+  src = fetchFromGitHub {
+    owner = "credativ";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-Ij+4ceQauX3tC97ftk/JS3/WlocPBf7A7PJrylpTLzw=";
+  };
+
+  nativeBuildInputs = [ libxslt.bin ];
+
+  buildInputs = [ postgresql ];
+
+  buildFlags = [ "all" "man" ];
+
+  preConfigure = ''
+    substituteInPlace doc/stylesheet-man.xsl \
+      --replace "http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl" "${docbook_xsl}/xml/xsl/docbook/manpages/docbook.xsl"
+  '';
+
+  installPhase = ''
+    install -Dm755 -t $out/bin pg_checksums_ext
+    install -Dm644 -t $out/share/man/man1 doc/man1/pg_checksums_ext.1
+  '';
+
+  meta = with lib; {
+    description = "Activate/deactivate/verify checksums in offline PostgreSQL clusters";
+    homepage = "https://github.com/credativ/pg_checksums";
+    maintainers = [ maintainers.marsam ];
+    mainProgram = "pg_checksums_ext";
+    platforms = postgresql.meta.platforms;
+    license = licenses.postgresql;
+  };
+}