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diff --git a/nixpkgs/pkgs/development/misc/resholve/deps.nix b/nixpkgs/pkgs/development/misc/resholve/deps.nix
new file mode 100644
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+{ lib, stdenv
+, python27Packages
+, fetchFromGitHub
+, makeWrapper
+, # re2c deps
+  autoreconfHook
+, # py-yajl deps
+  git
+, # oil deps
+  readline
+, cmark
+, file
+, glibcLocales
+, oilPatches ? [ ]
+}:
+
+/*
+Notes on specific dependencies:
+- if/when python2.7 is removed from nixpkgs, this may need to figure
+  out how to build oil's vendored python2
+- I'm not sure if glibcLocales is worth the addition here. It's to fix
+  a libc test oil runs. My oil fork just disabled the libc tests, but
+  I haven't quite decided if that's the right long-term call, so I
+  didn't add a patch for it here yet.
+*/
+
+rec {
+  # had to add this as well; 1.3 causes a break here; sticking
+  # to oil's official 1.0.3 dep for now.
+  re2c = stdenv.mkDerivation rec {
+    pname = "re2c";
+    version = "1.0.3";
+    sourceRoot = "${src.name}/re2c";
+    src = fetchFromGitHub {
+      owner = "skvadrik";
+      repo = "re2c";
+      rev = version;
+      sha256 = "0grx7nl9fwcn880v5ssjljhcb9c5p2a6xpwil7zxpmv0rwnr3yqi";
+    };
+    nativeBuildInputs = [ autoreconfHook ];
+    preCheck = ''
+      patchShebangs run_tests.sh
+    '';
+  };
+
+  py-yajl = python27Packages.buildPythonPackage rec {
+    pname = "oil-pyyajl-unstable";
+    version = "2019-12-05";
+    src = fetchFromGitHub {
+      owner = "oilshell";
+      repo = "py-yajl";
+      rev = "eb561e9aea6e88095d66abcc3990f2ee1f5339df";
+      sha256 = "17hcgb7r7cy8r1pwbdh8di0nvykdswlqj73c85k6z8m0filj3hbh";
+      fetchSubmodules = true;
+    };
+    # just for submodule IIRC
+    nativeBuildInputs = [ git ];
+  };
+
+  # resholve's primary dependency is this developer build of the oil shell.
+  oildev = python27Packages.buildPythonPackage rec {
+    pname = "oildev-unstable";
+    version = "2020-03-31";
+
+    src = fetchFromGitHub {
+      owner = "oilshell";
+      repo = "oil";
+      rev = "ea80cdad7ae1152a25bd2a30b87fe3c2ad32394a";
+      sha256 = "0pxn0f8qbdman4gppx93zwml7s5byqfw560n079v68qjgzh2brq2";
+
+      /*
+      It's not critical to drop most of these; the primary target is
+      the vendored fork of Python-2.7.13, which is ~ 55M and over 3200
+      files, dozens of which get interpreter script patches in fixup.
+      */
+      extraPostFetch = ''
+        rm -rf Python-2.7.13 benchmarks metrics py-yajl rfc gold web testdata services demo devtools cpp
+      '';
+    };
+
+    # TODO: not sure why I'm having to set this for nix-build...
+    #       can anyone tell if I'm doing something wrong?
+    SOURCE_DATE_EPOCH = 315532800;
+
+    # These aren't, strictly speaking, nix/nixpkgs specific, but I've
+    # had hell upstreaming them. Pulling from resholve source and
+    # passing in from resholve.nix
+    patches = oilPatches;
+
+    buildInputs = [ readline cmark py-yajl ];
+
+    nativeBuildInputs = [ re2c file makeWrapper ];
+
+    propagatedBuildInputs = with python27Packages; [ six typing ];
+
+    doCheck = true;
+
+    preBuild = ''
+      build/dev.sh all
+    '';
+
+    postPatch = ''
+      patchShebangs asdl build core doctools frontend native oil_lang
+    '';
+
+    _NIX_SHELL_LIBCMARK = "${cmark}/lib/libcmark${stdenv.hostPlatform.extensions.sharedLibrary}";
+
+    # See earlier note on glibcLocales
+    LOCALE_ARCHIVE = lib.optionalString (stdenv.buildPlatform.libc == "glibc") "${glibcLocales}/lib/locale/locale-archive";
+
+    meta = {
+      description = "A new unix shell";
+      homepage = "https://www.oilshell.org/";
+      license = with lib.licenses; [
+        psfl # Includes a portion of the python interpreter and standard library
+        asl20 # Licence for Oil itself
+      ];
+    };
+  };
+}