First stab

gradle-env.nix

@@ -0,0 +1,51 @@
+# This file is generated by gradle2nix.
+
+{ stdenvNoCC, lib, buildEnv, fetchurl }:
+
+{ path, env, repositories, artifacts }@args:
+
+let
+  mkPath = artifact: with artifact; lib.concatStringsSep "/" [
+    (lib.replaceChars ["."] ["/"] artifact.groupId)
+    artifact.artifactId
+    artifact.version
+  ];
+
+  mkFilename = artifact: with artifact;
+    "${artifactId}-${version}${lib.optionalString (classifier != "") "-${classifier}"}.${extension}";
+
+  mkArtifactUrl = base: artifact:
+    "${lib.removeSuffix "/" base}/${mkPath artifact}/${mkFilename artifact}";
+
+  fetchArtifact = artifact:
+  let
+    artifactPath = mkPath artifact;
+    artifactName = mkFilename artifact;
+  in stdenvNoCC.mkDerivation rec {
+    name = with artifact; lib.concatStrings [
+      (lib.replaceChars ["."] ["_"] groupId) "-"
+      (lib.replaceChars ["."] ["_"] artifactId) "-"
+      version
+      (lib.optionalString (classifier != "") "-${classifier}")
+      "-" extension
+    ];
+
+    src = fetchurl {
+      name = mkFilename artifact;
+      urls = map (url: mkArtifactUrl url artifact) repositories;
+      inherit (artifact) sha256;
+    };
+
+    phases = "installPhase fixupPhase";
+
+    installPhase = ''
+      mkdir -p $out/${artifactPath}
+      ln -s ${src} $out/${artifactPath}/${artifactName}
+    '';
+  };
+
+in
+buildEnv {
+  name = "gradle-env-${builtins.replaceStrings [":"] ["-"] path}-${env}";
+  paths = map fetchArtifact artifacts;
+}