diff --git a/pkgs/applications/science/electronics/flatcam/default.nix b/pkgs/applications/science/electronics/flatcam/default.nix
index 169130b41010..5332eb291d6f 100644
--- a/pkgs/applications/science/electronics/flatcam/default.nix
+++ b/pkgs/applications/science/electronics/flatcam/default.nix
@@ -1,91 +1,98 @@
 { lib
-, stdenv
-, python3
-, fetchPypi
 , fetchFromBitbucket
-, fetchpatch
-, substituteAll
-, geos
+, buildPythonApplication
+, pyqt5
+, matplotlib
+, numpy
+, cycler
+, python-dateutil
+, kiwisolver
+, six
+, setuptools
+, dill
+, Rtree
+, pyopengl
+, vispy
+, ortools
+, svg-path
+, simplejson
+, shapely
+, freetype-py
+, fonttools
+, rasterio
+, lxml
+, ezdxf
+, qrcode
+, reportlab
+, svglib
+, gdal
+, pyserial
+, python3
 }:
 
-let
-  python = python3.override {
-    packageOverrides = self: super: {
-      shapely = super.shapely.overridePythonAttrs (old: rec {
-        version = "1.8.4";
-
-        src = fetchPypi {
-          pname = "Shapely";
-          inherit version;
-          hash = "sha256-oZXlHKr6IYKR8suqP+9p/TNTyT7EtlsqRyLEz0DDGYw=";
-        };
-
-        # Environment variable used in shapely/_buildcfg.py
-        GEOS_LIBRARY_PATH = "${geos}/lib/libgeos_c${stdenv.hostPlatform.extensions.sharedLibrary}";
-
-        patches = [
-          # Patch to search form GOES .so/.dylib files in a Nix-aware way
-          (substituteAll {
-            src = ./shapely-library-paths.patch;
-            libgeos_c = GEOS_LIBRARY_PATH;
-            libc = lib.optionalString (!stdenv.isDarwin) "${stdenv.cc.libc}/lib/libc${stdenv.hostPlatform.extensions.sharedLibrary}.6";
-          })
-        ];
-
-        postPatch = ''
-          substituteInPlace pyproject.toml \
-            --replace 'setuptools<64' 'setuptools'
-        '';
-      });
-    };
-  };
-in
-python.pkgs.buildPythonApplication rec {
+buildPythonApplication rec {
   pname = "flatcam";
-  version = "8.5";
+  version = "unstable-2022-02-02";
 
   src = fetchFromBitbucket {
     owner = "jpcgt";
     repo = pname;
-    rev = "533afd6a1772857cb633c011b5e0a15b60b1e92e"; # 8.5 with Red Hat packaging.
-    sha256 = "199kiiml18k34z1zhk2hbhibphmnv0kb11kxiajq52alps0mjb3m";
+    rev = "ebf5cb9e3094362c4b0774a54cf119559c02211d"; # beta branch as of 2022-02-02
+    hash = "sha256-QKkBPEM+HVYmSZ83b4JRmOmCMp7C3EUqbJKPqUXMiKE=";
   };
 
-  propagatedBuildInputs = with python.pkgs; [
+  format = "other";
+
+  dontBuild = true;
+
+  propagatedBuildInputs = [
+    pyqt5
     matplotlib
     numpy
-    packaging
-    pyqt4
-    rtree
-    scipy
-    setuptools
-    shapely
-    simplejson
+    cycler
+    python-dateutil
+    kiwisolver
     six
+    setuptools
+    dill
+    Rtree
+    pyopengl
+    vispy
+    ortools
     svg-path
+    simplejson
+    shapely
+    freetype-py
+    fonttools
+    rasterio
+    lxml
+    ezdxf
+    qrcode
+    reportlab
+    svglib
+    gdal
+    pyserial
   ];
 
-  packaging_fix_pull_request_patch = fetchpatch {
-    name = "packaging_fix_pull_request.patch";
-    url = "https://bitbucket.org/trepetti/flatcam/commits/5591ed889d1f48a5190fe237b562cb932cb5876c/raw";
-    sha256 = "19rhjdrf1n1q29cgpcry6pl2kl90zq0d613hhkwdir9bhq5bkknp";
-  };
+  preInstall = ''
+    patchShebangs .
 
-  patches = [
-    packaging_fix_pull_request_patch
-    ./release.patch
-  ];
+    sed -i "s|/usr/local/bin|$out/bin|" Makefile
 
-  postPatch = ''
-    substituteInPlace setup.py --replace "'shapely>=1.3'" "'shapely>=1.3',"
+    mkdir -p $out/share/{flatcam,applications}
+    mkdir -p $out/bin
   '';
 
-  # Only non-GUI tests can be run deterministically in the Nix build environment.
-  checkPhase = ''
-    python -m unittest tests.test_excellon
-    python -m unittest tests.test_gerber_buffer
-    python -m unittest tests.test_paint
-    python -m unittest tests.test_pathconnect
+  installFlags = [
+    "USER_ID=0"
+    "LOCAL_PATH=/build/source/."
+    "INSTALL_PATH=${placeholder "out"}/share/flatcam"
+    "APPS_PATH=${placeholder "out"}/share/applications"
+  ];
+
+  postInstall = ''
+    sed -i "s|python3|${python3.withPackages (_: propagatedBuildInputs)}/bin/python3|" $out/bin/flatcam-beta
+    mv $out/bin/flatcam{-beta,}
   '';
 
   meta = with lib; {
diff --git a/pkgs/applications/science/electronics/flatcam/release.patch b/pkgs/applications/science/electronics/flatcam/release.patch
deleted file mode 100644
index 945228e35bab..000000000000
--- a/pkgs/applications/science/electronics/flatcam/release.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/FlatCAMVersion.py b/FlatCAMVersion.py
-index ba9e04a5..2c64d5a6 100644
---- a/FlatCAMVersion.py
-+++ b/FlatCAMVersion.py
-@@ -16,7 +16,7 @@ version = {
-     "number": 8.5,
-     "date": (2016, 7, 1),  # Year, Month, Day
-     "name": None,
--    "release": False,
-+    "release": True,
- }
- 
- 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 41cb855c79f8..6fb915896572 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -39961,7 +39961,7 @@ with pkgs;
 
   diylc = callPackage ../applications/science/electronics/diylc { };
 
-  flatcam = callPackage ../applications/science/electronics/flatcam { };
+  flatcam = python3.pkgs.callPackage ../applications/science/electronics/flatcam { };
 
   flopoco = callPackage ../applications/science/electronics/flopoco { };