Change:
<ins> { stdenv , lib , fetchFromGitHub , lazarus , fpc , libX11 # GTK2/3 , pango , cairo , glib , atk , gtk2 , gtk3 , gdk-pixbuf , python3 # Qt5 , libqt5pas , qt5 , widgetset ? "qt5" # See https://github.com/Alexey-T/CudaText-lexers , additionalLexers ? [ "Nix" ] }: assert builtins.elem widgetset [ "gtk2" "gtk3" "qt5" ]; let deps = lib.mapAttrs (name: spec: fetchFromGitHub { owner = "Alexey-T"; repo = name; inherit (spec) rev sha256; } ) (builtins.fromJSON (builtins.readFile ./deps.json)); in stdenv.mkDerivation rec { pname = "cudatext"; version = "1.111.0"; src = fetchFromGitHub { owner = "Alexey-T"; repo = "CudaText"; rev = version; sha256 = "1ai0g8fmw4m237dqh5dkr8w9qqricyvp49ijz2ivvmg9dsdfzjfp"; }; patches = [ # Don't check for update ./dont-check-update.patch ]; postPatch = '' substituteInPlace app/proc_globdata.pas  --replace "/usr/share/cudatext" "$out/share/cudatext"  --replace "libpython3.so" "${python3}/lib/libpython3.so" ''; nativeBuildInputs = [ lazarus fpc ] ++ lib.optional (widgetset == "qt5") qt5.wrapQtAppsHook; buildInputs = [ libX11 ] ++ lib.optionals (lib.hasPrefix "gtk" widgetset) [ pango cairo glib atk gdk-pixbuf ] ++ lib.optional (widgetset == "gtk2") gtk2 ++ lib.optional (widgetset == "gtk3") gtk3 ++ lib.optional (widgetset == "qt5") libqt5pas; NIX_LDFLAGS = "--as-needed -rpath ${lib.makeLibraryPath buildInputs}"; buildPhase = lib.concatStringsSep "n" (lib.mapAttrsToList (name: dep: '' cp -r --no-preserve=mode ${dep} ${name} '') deps) + '' lazbuild --lazarusdir=${lazarus}/share/lazarus --pcp=./lazarus --ws=${widgetset}  EncConv/encconv/encconv_package.lpk  ATBinHex-Lazarus/atbinhex/atbinhex_package.lpk  ATFlatControls/atflatcontrols/atflatcontrols_package.lpk  ATSynEdit/atsynedit/atsynedit_package.lpk  ATSynEdit_Cmp/atsynedit_cmp/atsynedit_cmp_package.lpk  EControl/econtrol/econtrol_package.lpk  ATSynEdit_Ex/atsynedit_ex/atsynedit_ex_package.lpk  Python-for-Lazarus/python4lazarus/python4lazarus_package.lpk  Emmet-Pascal/emmet/emmet_package.lpk  app/cudatext.lpi ''; installPhase = '' install -Dm755 app/cudatext $out/bin/cudatext install -dm755 $out/share/cudatext cp -r app/{data,py,settings_default} $out/share/cudatext install -Dm644 setup/debfiles/cudatext-512.png -t $out/share/pixmaps install -Dm644 setup/debfiles/cudatext.desktop -t $out/share/applications '' + lib.concatMapStringsSep "n" (lexer: '' install -Dm644 CudaText-lexers/${lexer}/*.{cuda-lexmap,lcf} $out/share/cudatext/data/lexlib '') additionalLexers; meta = with lib; { description = "Cross-platform code editor"; longDescription = '' Text/code editor with lite UI. Syntax highlighting for 200+ languages. Config system in JSON files. Multi-carets and multi-selections. Search and replace with RegEx. Extendable by Python plugins and themes. ''; homepage = "http://www.uvviewsoft.com/cudatext/"; license = licenses.mpl20; maintainers = with maintainers; [ sikmir ]; platforms = platforms.linux; }; } </ins>

Discussion:
Cross-platform text editor, written in Lazarus From: Repository: Mirror: Development seems very active (last commit 15 minutes ago). Might be a nice open source alternative to SublimeText.
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Still important to me.