icbm3d: modernize

pkgs/by-name/ic/icbm3d/package.nix

@@ -5,12 +5,13 @@
   libX11,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "icbm3d";
   version = "0.4";
+
   src = fetchurl {
-    url = "ftp://ftp.tuxpaint.org/unix/x/icbm3d/icbm3d.${version}.tar.gz";
-    sha256 = "1z9q01mj0v9qbwby5cajjc9wpvdw2ma5v1r639vraxpl9qairm4s";
+    url = "ftp://ftp.tuxpaint.org/unix/x/icbm3d/icbm3d.${finalAttrs.version}.tar.gz";
+    hash = "sha256-mtQcFU70dpV3GiaHXVQVvO3LE5NSseIXXzhtIGsAOP0=";
   };
 
   buildInputs = [ libX11 ];
@@ -22,8 +23,11 @@ stdenv.mkDerivation rec {
   env.NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
 
   installPhase = ''
-    mkdir -p $out/bin
-    cp icbm3d $out/bin
+    runHook preInstall
+
+    install -Dm755 -t $out/bin icbm3d
+
+    runHook postInstall
   '';
 
   meta = {
@@ -33,4 +37,4 @@ stdenv.mkDerivation rec {
     license = lib.licenses.gpl2Plus;
     platforms = lib.platforms.linux;
   };
-}
+})