diff --git a/README.md b/README.md
index 0e56050..dae0712 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,10 @@ Simple program to split video file into clips of requested length
 go run . --filename 'Family Guy - S01E01 - Death Has a Shadow SDTV.mkv' --clip_length 5
 ```
 
+# Dependencies
+
+This program relies on ffmpeg so make sure to install it
+
 # Running with nix
 ```
 nix run git+https://git.catnip.ee/miisu/clip-maker -- --filename 'Video.mp4'
diff --git a/build.nix b/build.nix
index eab3844..345fa9a 100644
--- a/build.nix
+++ b/build.nix
@@ -8,4 +8,12 @@
         "-s"
         "-w"
     ];
+
+    nativeBuildInputs = with pkgs; [
+        makeWrapper
+    ];
+
+    postInstall = ''
+        wrapProgram $out/bin/clip-maker --prefix PATH : ${lib.makeBinPath [ pkgs.ffmpeg ]}
+    '';
 }
\ No newline at end of file
diff --git a/flake.nix b/flake.nix
index 59dd31d..ff37604 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,6 +16,7 @@
         devShells.default = mkShell rec {
           buildInputs = with pkgs; [
             go
+            ffmpeg
           ];
         };
         packages.default = pkgs.callPackage ./build.nix { };
diff --git a/main.go b/main.go
index 90813d5..0e8912e 100644
--- a/main.go
+++ b/main.go
@@ -11,15 +11,9 @@ import (
 	"strings"
 )
 
-func GetVideoLength(fileName string) (seconds int, err error) {
-	// var path string
-	// path, err = filepath.Abs(fileName)
-	// if err != nil {
-	// 	return
-	// }
-
+func GetVideoLength(ffprobeLocation string, fileName string) (seconds int, err error) {
 	var out []byte
-	out, err = exec.Command("/bin/sh", "-c", fmt.Sprintf("ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 \"%s\"", fileName)).CombinedOutput()
+	out, err = exec.Command("/bin/sh", "-c", fmt.Sprintf("%s -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 \"%s\"", ffprobeLocation, fileName)).CombinedOutput()
 	if err != nil {
 		return
 	}
@@ -40,30 +34,32 @@ func ProcessFileName(filename string) string {
 }
 func main() {
 	filename := flag.String("filename", "", "video to make clips of")
-	clip_length := flag.Int("clip_length", 2, "how long each clip should be")
+	clip_length := flag.Int("clip_length", 2, "how many seconds long each clip should be")
 	clips_folder := flag.String("clips_folder", "clips", "folder to store clips in")
+	ffmpegLocation := flag.String("ffmpeg", "ffmpeg", "specify ffmpeg location if its not in path")
+	ffprobeLocation := flag.String("ffprobe", "ffprobe", "specify ffprobe location if its not in path")
 	flag.Parse()
 
 	if *filename == "" {
 		log.Fatalln("Please insert video to make clips of")
 	}
 
+	fmt.Println("Creating clips folder:", *clips_folder)
 	if err := os.MkdirAll(*clips_folder, 0777); err != nil {
 		log.Fatal(err)
 	}
 
-	length, err := GetVideoLength(*filename)
+	length, err := GetVideoLength(*ffprobeLocation, *filename)
 	if err != nil {
 		log.Fatal(err)
 	}
 
 	for start := 0; start <= length; start += *clip_length {
 		fmt.Printf("Creating clip for seconds %d to %d\n", start, start+*clip_length)
-		out, err := exec.Command("/bin/sh", "-c", fmt.Sprintf("ffmpeg -ss %d -i \"%s\" -c copy -t %d \"%s/%s seconds %d to %d.mp4\"", start, *filename, clip_length, *clips_folder, ProcessFileName(*filename), start, start+*clip_length)).CombinedOutput()
+		out, err := exec.Command("/bin/sh", "-c", fmt.Sprintf("%s -ss %d -i \"%s\" -c copy -t %d \"%s/%s seconds %d to %d.mp4\"", *ffmpegLocation, start, *filename, clip_length, *clips_folder, ProcessFileName(*filename), start, start+*clip_length)).CombinedOutput()
 		if err != nil {
 			fmt.Print(string(out))
 			log.Fatal(err)
 		}
 	}
-
 }