diff --git a/nix/arcanist.nix b/nix/arcanist.nix
index 489c32149..901e40cec 100644
--- a/nix/arcanist.nix
+++ b/nix/arcanist.nix
@@ -1,64 +1,69 @@
 { stdenv
 , lib
 , cacert
 , fetchFromGitHub
 , installShellFiles
 , makeWrapper
 , php80
 , python3
 , which
 }:
 
 stdenv.mkDerivation {
   pname = "arcanist";
   version = "20220517";
 
   src = fetchFromGitHub {
     owner = "phacility";
     repo = "arcanist";
     rev = "85c953ebe4a6fef332158fd757d97c5a58682d3a";
     sha256 = "0x847fw74mzrbhzpgc4iqgvs6dsf4svwfa707dsbxi78fn2lxbl7";
   };
 
   # These need to be in PATH during the build
   nativeBuildInputs = [ php80 python3 installShellFiles makeWrapper ];
 
   # Since we are exporting a script, we do not need to do an actual "build"
   doBuild = false;
 
   installPhase = ''
     # Copy arcanist contents
-    mkdir -p $out/libexec
+    mkdir -p $out/libexec $out/bin
     cp -R . $out/libexec/arcanist
 
     # provide a recent up-to-date certificate bundle for ssl
     ln -sf ${cacert}/etc/ssl/certs/ca-bundle.crt \
       $out/libexec/arcanist/resources/ssl/default.pem
 
-    # convert `#!/usr/bin/env php` into calling nixpkgs php interpreter
-    patchShebangs $out/libexec/arcanist/bin/arc
+    # The canonical way to handle shebangs with nix is to use `patchShebangs`
+    # which will resolve to the absolute path of the interpreter.
+    # However, darwin will fail to interpret a shebang of 80 characters or
+    # longer for the first argument. Nix store paths hover around this limit.
+    # See https://github.com/NixOS/nixpkgs/issues/93609 for related issue.
+    cat << WRAPPER > $out/bin/arc
+    #!$shell -e
+    export PATH=${lib.makeBinPath [ python3 php80 which]}''${PATH:+':'}\$PATH
+    exec ${php80}/bin/php $out/libexec/arcanist/bin/arc "\$@"
+    WRAPPER
 
-    # Create a bin/arc which points to the real script, but provides
-    # assumptions such as the PATH including python3 and which
-    makeWrapper $out/libexec/arcanist/bin/arc $out/bin/arc \
-      --prefix PATH : ${lib.makeBinPath [ which python3 php80 ]}
+    chmod +x $out/bin/arc
 
     # Add shell completion for bash
     $out/bin/arc shell-complete --generate --
     installShellCompletion --cmd arc --bash \
       $out/libexec/arcanist/support/shell/rules/bash-rules.sh
   '';
 
   # Ensure `arc` is able to run without failing
   doInstallCheck = true;
   installCheckPhase = ''
     $out/bin/arc help diff -- > /dev/null
   '';
 
   meta = {
     description = "Command line interface to Phabricator";
     homepage = "http://phabricator.org";
     license = lib.licenses.asl20;
     platforms = lib.platforms.unix;
   };
 }