use printf instead of clear; use dontBuild over phases

Author: rpearce

bashcards

@@ -74,8 +74,14 @@ function make_card {
   return 0
 }
 
+function clearscreen {
+  printf '\033c'
+  return 0
+}
+
+
 function run_cards {
-  clear
+  clearscreen
 
   local cards_name=$1
   eval "declare -A cards="${2#*=}
@@ -140,7 +146,7 @@ function select_file {
     opts+=("$(to_filename $file)")
   done
 
-  clear
+  clearscreen
   echo "What would you like to practice?"
 
   # list the files

derivation.nix

@@ -3,7 +3,7 @@
 pkgs.stdenv.mkDerivation {
   name = "bashcards";
   src = ./.;
-  phases = "unpackPhase installPhase";
+  dontBuild = true;
   installPhase = ''
     mkdir -p $out/bin $out/share/man/man8
     cp bashcards.8 $out/share/man/man8/

shell.nix

@@ -5,7 +5,7 @@ bashcards = pkgs.callPackage ./derivation.nix { };
 in
 pkgs.mkShell {
   buildInputs = with pkgs; [
-    man
     bashcards
+    man
   ];
 }