diff --git a/flake.nix b/flake.nix
index 8cb8a25..48062e7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -27,7 +27,6 @@
             ]; # patches, version pins, new pkgs here.
           }
         ));
-
     in {
       devShells = forAllSystems (pkgs: {
         default = pkgs.mkShell {
@@ -36,6 +35,12 @@
               cocotb
               cocotb-bus
               litex
+              litedram
+              liteeth
+              litescope
+              pythondata-cpu-vexriscv
+              pythondata-software-compiler_rt
+              pythondata-software-picolibc
               amaranth
             ]))
             yosys
@@ -50,7 +55,6 @@
             ecpdap # easier to poke probes.
           ];
         };
-
       });
   };
 }
diff --git a/litex/default.nix b/litex/default.nix
index 34ae2fd..a754421 100644
--- a/litex/default.nix
+++ b/litex/default.nix
@@ -5,6 +5,12 @@ in final: prev: {
   pythonPackagesExtensions = prev.pythonPackagesExtensions ++ [
     (python-final: python-prev: {
       litex = python-final.callPackage(import ./litex.nix tag) { };
+      litedram = python-final.callPackage(import ./litedram.nix tag) { };
+      liteeth = python-final.callPackage(import ./liteeth.nix tag) { };
+      litescope = python-final.callPackage(import ./litescope.nix tag) { };
+      pythondata-cpu-vexriscv = python-final.callPackage(import ./pythondata-cpu-vexriscv.nix tag) { };
+      pythondata-software-compiler_rt = python-final.callPackage(import ./pythondata-software-compiler_rt.nix tag) { };
+      pythondata-software-picolibc = python-final.callPackage(import ./pythondata-software-picolibc.nix tag) { };
     })
   ];
 }
diff --git a/litex/litedram.nix b/litex/litedram.nix
new file mode 100644
index 0000000..7eb6c18
--- /dev/null
+++ b/litex/litedram.nix
@@ -0,0 +1,27 @@
+tag: {
+  pkgs 
+, lib
+, buildPythonPackage 
+, migen
+, pyyaml
+}: buildPythonPackage {
+  pname = "litedram";
+  version = "${tag}";
+
+  src = pkgs.fetchFromGitHub {
+    owner = "enjoy-digital";
+    repo = "litedram";
+    rev = "${tag}";
+    hash = "sha256-EaUszy0v6r5sKM5d5YmpRbR8Cf9xITObU71zUpg9cLU=";
+  };
+
+  buildInputs = [
+    pyyaml
+    migen
+  ];
+
+  checkPhase = ''
+    python -m unittest test
+  '';
+  doCheck = true;
+}
diff --git a/litex/liteeth.nix b/litex/liteeth.nix
new file mode 100644
index 0000000..dfb1f43
--- /dev/null
+++ b/litex/liteeth.nix
@@ -0,0 +1,36 @@
+tag: {
+  pkgs 
+, lib
+, buildPythonPackage 
+, migen
+, setuptools
+, litex
+, pyyaml
+}: buildPythonPackage {
+  pname = "liteeth";
+  version = "${tag}";
+
+  src = pkgs.fetchFromGitHub {
+    owner = "enjoy-digital";
+    repo = "liteeth";
+    rev = "${tag}";
+    hash = "sha256-DUNwDzcFLVmL5F/ZWmok7T7jO7ixC9IuDr1WUarnAqk=";
+  };
+
+  buildInputs = [
+    litex
+  ];
+
+  propagatedBuildInputs = [
+    migen
+  ];
+
+  nativeCheckInputs = [
+    pyyaml
+  ];
+
+  checkPhase = ''
+    python -m unittest test
+  '';
+  doCheck = true;
+}
diff --git a/litex/litescope.nix b/litex/litescope.nix
new file mode 100644
index 0000000..a731763
--- /dev/null
+++ b/litex/litescope.nix
@@ -0,0 +1,27 @@
+tag: {
+  pkgs 
+, lib
+, buildPythonPackage 
+, migen
+, setuptools
+, litex
+}: buildPythonPackage {
+  pname = "litescope";
+  version = "${tag}";
+
+  src = pkgs.fetchFromGitHub {
+    owner = "enjoy-digital";
+    repo = "litescope";
+    rev = "${tag}";
+    hash = "sha256-OWC+XwB+BzlCQkPKJCbQ0W4T6JbsInldrn9jYYjWypM=";
+  };
+
+  buildInputs = [
+    litex
+  ];
+
+  checkPhase = ''
+    python -m unittest test
+  '';
+  doCheck = true;
+}
diff --git a/litex/litex.nix b/litex/litex.nix
index 5619107..15255a5 100644
--- a/litex/litex.nix
+++ b/litex/litex.nix
@@ -5,13 +5,11 @@ tag: {
 , pyserial
 , migen
 , requests
-, colorama
 , packaging
-, setuptools
+, pexpect
 }: buildPythonPackage {
   pname = "litex";
   version = "${tag}";
-  pyproject = true;
 
   src = pkgs.fetchFromGitHub {
     owner = "enjoy-digital";
@@ -21,14 +19,12 @@ tag: {
   };
 
   buildInputs = [
-    setuptools
+    migen
   ];
 
   propagatedBuildInputs = [
-    migen
     requests
     pyserial
-    colorama
     packaging
   ];
 
diff --git a/litex/pythondata-cpu-vexriscv.nix b/litex/pythondata-cpu-vexriscv.nix
new file mode 100644
index 0000000..4f93207
--- /dev/null
+++ b/litex/pythondata-cpu-vexriscv.nix
@@ -0,0 +1,16 @@
+tag: {
+  pkgs 
+, buildPythonPackage 
+}: buildPythonPackage rec {
+  pname = "pythondata-cpu-vexriscv";
+  version = "${tag}";
+
+  src = pkgs.fetchFromGitHub {
+    owner = "litex-hub";
+    repo = "pythondata-cpu-vexriscv";
+    rev = "${tag}";
+    hash = "sha256-1RgwJCYxtiP5dfRHulfTNBgu6fum6RfoqkbFIlRTgKI=";
+  };
+
+  doCheck = false;
+}
diff --git a/litex/pythondata-software-compiler_rt.nix b/litex/pythondata-software-compiler_rt.nix
new file mode 100644
index 0000000..9629e9e
--- /dev/null
+++ b/litex/pythondata-software-compiler_rt.nix
@@ -0,0 +1,16 @@
+tag: {
+  pkgs 
+, buildPythonPackage 
+}: buildPythonPackage rec {
+  pname = "pythondata-software-compiler_rt";
+  version = "${tag}";
+
+  src = pkgs.fetchFromGitHub {
+    owner = "litex-hub";
+    repo = "pythondata-software-compiler_rt";
+    rev = "${tag}";
+    hash = "sha256-s/tfxhPwYAnu1z1LxEimeYWjX6IHbF2uD/1HjvQn/xo=";
+  };
+
+  doCheck = false;
+}
diff --git a/litex/pythondata-software-picolibc.nix b/litex/pythondata-software-picolibc.nix
new file mode 100644
index 0000000..770b110
--- /dev/null
+++ b/litex/pythondata-software-picolibc.nix
@@ -0,0 +1,16 @@
+tag: {
+  pkgs 
+, buildPythonPackage 
+}: buildPythonPackage rec {
+  pname = "pythondata-software-picolibc";
+  version = "${tag}";
+
+  src = pkgs.fetchFromGitHub {
+    owner = "litex-hub";
+    repo = "pythondata-software-picolibc";
+    rev = "${tag}";
+    hash = "sha256-5OY17BA37c6aHOvUwb0gJwXxGey4TdUiTTxJD5wuSGU=";
+  };
+
+  doCheck = false;
+}