Simplify building with nix

README.md

@@ -16,3 +16,6 @@ I have processed 17-minute videos completely fine, but be wary if you're gonna g
 I want to use pyinstaller to turn this into an executable, so non-techy people
 can use it EVEN IF they don't have Python and all those libraries. Jabrils 
 recommended this to me. However, my pyinstaller build did not work. :( HELP
+
+## Building with nix
+`nix-build` to get a script with all the libraries and ffmpeg, `nix-build -A bundle` to get a single binary.

default.nix

@@ -0,0 +1,55 @@
+with import <nixpkgs> {};
+
+let 
+  python = python2;
+  audiotsm = python.pkgs.buildPythonPackage {
+      name = "audiotsm-0.1.2";
+      src = pkgs.fetchurl { url = "https://files.pythonhosted.org/packages/f8/b8/721a9c613641c938a6fb9c7c3efb173b7f77b519de066e9cd2eeb27c3289/audiotsm-0.1.2.tar.gz"; sha256 = "8870af28fad0a76cac1d2bb2b55e7eac6ad5d1ad5416293eb16120dece6c0281"; };
+      doCheck = false;
+      buildInputs = [];
+      propagatedBuildInputs = [
+        python.pkgs.numpy
+      ];
+      meta = with pkgs.stdenv.lib; {
+        homepage = "https://github.com/Muges/audiotsm";
+        license = licenses.mit;
+        description = "A real-time audio time-scale modification library";
+      };
+    };
+
+  pythonForThis = python.withPackages (ps: with ps;[
+    scipy
+    numpy
+    pillow
+    audiotsm
+  ]);
+  jumpcutter = stdenv.mkDerivation {
+    pname = "jumpcutter";
+    version = "0.0.1";
+    src = ./.;
+    buildInputs = [
+      pythonForThis
+      ffmpeg
+    ];
+    installPhase = ''
+      mkdir -p $out/bin
+      echo "#!${pythonForThis}/bin/python" > $out/bin/jumpcutter
+      cat $src/jumpcutter.py >> $out/bin/jumpcutter
+      substituteInPlace $out/bin/jumpcutter --replace ffmpeg ${ffmpeg}
+      chmod +x $out/bin/jumpcutter
+    '';
+  };
+
+  nix-bundle-src = builtins.fetchGit {
+    url = "https://github.com/matthewbauer/nix-bundle";
+    rev = "113d8c6b426b0932a64c58c21cd065baad4c2314";
+  };
+  nix-bundle = (import ("${nix-bundle-src}/appimage-top.nix") {}) // (import "${nix-bundle-src}/default.nix" {});
+in
+  jumpcutter // {
+    bundle = nix-bundle.nix-bootstrap {
+      extraTargets = [];
+      target = jumpcutter;
+      run = "/bin/jumpcutter";
+    };
+  }