project nix shell(s)

11 files changed, 606 insertions, 199 deletions

diff --git a/dub.selections.json b/dub.selections.json
index 5e87b49..a4bd018 100644
--- a/dub.selections.json
+++ b/dub.selections.json
@@ -1,8 +1,8 @@
 {
 	"fileVersion": 1,
 	"versions": {
-		"d2sqlite3": "0.18.3",
-		"dyaml": "0.8.2",
+		"d2sqlite3": "0.19.1",
+		"dyaml": "0.8.3",
 		"imageformats": "7.0.2",
 		"tinyendian": "0.2.0"
 	}
diff --git a/makefile b/makefile
index 00b4e49..386bf34 100644
--- a/makefile
+++ b/makefile
@@ -534,6 +534,26 @@ tangle_maker:
 				(setq-local org-src-preserve-indentation t) \
 			(org-babel-tangle) \
 			(kill-buffer)) '($$ORGFILES)))" 2>&1
+nixsh_dmd_nixpkg:
+	ln -sf nixDevEnv/shells/shell-dmd-verNix.nix shell.nix; \
+	ln -sf nixDevEnv/dub/mkDub-dmd.nix mkDub.nix; \
+	ls -la shell.nix mkDub.nix | cut -d " " -f 9-; \
+	nix-shell;
+nixsh_dmd_user:
+	ln -sf nixDevEnv/shells/shell-dmd-verUser.nix shell.nix; \
+	ln -sf nixDevEnv/dub/mkDub-dmd.nix mkDub.nix; \
+	ls -la shell.nix mkDub.nix | cut -d " " -f 9-; \
+	nix-shell;
+nixsh_ldc_nixpkg:
+	ln -sf nixDevEnv/shells/shell-ldc-verNix.nix shell.nix; \
+	ln -sf nixDevEnv/dub/mkDub-ldc.nix mkDub.nix; \
+	ls -la shell.nix mkDub.nix | cut -d " " -f 9-; \
+	nix-shell;
+nixsh_ldc_user:
+	ln -sf nixDevEnv/shells/shell-ldc-verUser.nix shell.nix; \
+	ln -sf nixDevEnv/dub/mkDub-ldc.nix mkDub.nix; \
+	ls -la shell.nix mkDub.nix | cut -d " " -f 9-; \
+	nix-shell;
 gitsnapshot: distclean tangle
 	git commit -a
 .PHONY : all build rebuild debug release \
diff --git a/mkDub.nix b/mkDub.nix
index 8fe20a3..f3b6966 100644..120000
--- a/mkDub.nix
+++ b/mkDub.nix
@@ -1,125 +1 @@
-{ pkgs ? import <nixpkgs> {},
-  stdenv ? pkgs.stdenv,
-  rdmd ? pkgs.rdmd,
-  #dmd ? pkgs.dmd,
-  #gcc ? pkgs.gcc,
-  ldc ? pkgs.ldc,
-  dub ? pkgs.dub
-}:
-
-with stdenv;
-let
-  # Filter function to remove the .dub package folder from src
-  filterDub = name: type: let baseName = baseNameOf (toString name); in ! (
-    type == "directory" && baseName == ".dub"
-  );
-
-  # Convert a GIT rev string (tag) to a simple semver version
-  rev-to-version = builtins.replaceStrings ["v" "refs/tags/v"] ["" ""];
-
-  dep2src = dubDep: pkgs.fetchgit { inherit (dubDep.fetch) url rev sha256 fetchSubmodules; };
-
-  # Fetch a dependency (source only for now)
-  fromDub = dubDep: mkDerivation rec {
-    name = "${src.name}-${version}";
-    version = rev-to-version dubDep.fetch.rev;
-    nativeBuildInputs = [ rdmd ldc dub ];
-    src = dep2src dubDep;
-
-    buildPhase = ''
-      runHook preBuild
-      export HOME=$PWD
-      dub build -b=release
-      runHook postBuild
-    '';
-
-    # outputs = [ "lib" ];
-
-    # installPhase = ''
-    #   runHook preInstall
-    #   mkdir -p $out/bin
-    #   runHook postInstall
-    # '';
-  };
-
-  # Adds a local package directory (e.g. a git repository) to Dub
-  dub-add-local = dubDep: "dub add-local ${(fromDub dubDep).src.outPath} ${rev-to-version dubDep.fetch.rev}";
-
-  # The target output of the Dub package
-  targetOf = package: "${package.targetPath or "."}/${package.targetName or package.name}";
-
-  # Remove reference to build tools and library sources
-  disallowedReferences = deps: [ ldc rdmd dub ] ++ builtins.map dep2src deps;
-
-  removeExpr = refs: ''remove-references-to ${lib.concatMapStrings (ref: " -t ${ref}") refs}'';
-
-in {
-  inherit fromDub;
-
-  mkDubDerivation = lib.makeOverridable ({
-    src,
-    nativeBuildInputs ? [],
-    dubJSON ? src + "/dub.json",
-    selections ? src + "/dub.selections.nix",
-    deps ? import selections,
-    passthru ? {},
-    package ? lib.importJSON dubJSON,
-    ...
-  } @ attrs: stdenv.mkDerivation (attrs // {
-
-    pname = package.name;
-
-    nativeBuildInputs = [ rdmd ldc dub pkgs.removeReferencesTo ] ++ nativeBuildInputs;
-    disallowedReferences = disallowedReferences deps;
-
-    passthru = passthru // {
-      inherit dub ldc rdmd pkgs;
-    };
-
-    src = lib.cleanSourceWith {
-      filter = filterDub;
-      src = lib.cleanSource src;
-    };
-
-    preFixup = ''
-      find $out/bin -type f -exec ${removeExpr (disallowedReferences deps)} '{}' + || true
-    '';
-
-    buildPhase = ''
-      runHook preBuild
-
-      export HOME=$PWD
-      ${lib.concatMapStringsSep "\n" dub-add-local deps}
-      dub build --compiler=ldc2 --build=release --combined --skip-registry=all
-      #dub build -b optimize -b inline --combined --skip-registry=all
-
-      runHook postBuild
-    '';
-
-    checkPhase = ''
-      runHook preCheck
-
-      export HOME=$PWD
-      ${lib.concatMapStringsSep "\n" dub-add-local deps}
-      dub test --combined --skip-registry=all
-
-      runHook postCheck
-    '';
-
-    installPhase = ''
-      runHook preInstall
-
-      mkdir -p $out/bin
-      cp -r "${targetOf package}" $out/bin
-
-      runHook postInstall
-    '';
-
-    meta = lib.optionalAttrs (package ? description) {
-      description = package.description;
-    } // attrs.meta or {};
-  } // lib.optionalAttrs (!(attrs ? version)) {
-    # Use name from dub.json, unless pname and version are specified
-    name = package.name;
-  }));
-}
+nixDevEnv/dub/mkDub-ldc.nix
\ No newline at end of file
diff --git a/nixDevEnv/dub/mkDub-dmd.nix b/nixDevEnv/dub/mkDub-dmd.nix
new file mode 100644
index 0000000..2600d30
--- /dev/null
+++ b/nixDevEnv/dub/mkDub-dmd.nix
@@ -0,0 +1,121 @@
+{ pkgs ? import <nixpkgs> {},
+  stdenv ? pkgs.stdenv,
+  rdmd ? pkgs.rdmd,
+  dmd ? pkgs.dmd,
+  dub ? pkgs.dub }:
+
+with stdenv;
+let
+  # Filter function to remove the .dub package folder from src
+  filterDub = name: type: let baseName = baseNameOf (toString name); in ! (
+    type == "directory" && baseName == ".dub"
+  );
+
+  # Convert a GIT rev string (tag) to a simple semver version
+  rev-to-version = builtins.replaceStrings ["v" "refs/tags/v"] ["" ""];
+
+  dep2src = dubDep: pkgs.fetchgit { inherit (dubDep.fetch) url rev sha256 fetchSubmodules; };
+
+  # Fetch a dependency (source only for now)
+  fromDub = dubDep: mkDerivation rec {
+    name = "${src.name}-${version}";
+    version = rev-to-version dubDep.fetch.rev;
+    nativeBuildInputs = [ rdmd dmd dub ];
+    src = dep2src dubDep;
+
+    buildPhase = ''
+      runHook preBuild
+      export HOME=$PWD
+      dub build -b=release
+      runHook postBuild
+    '';
+
+    # outputs = [ "lib" ];
+
+    # installPhase = ''
+    #   runHook preInstall
+    #   mkdir -p $out/bin
+    #   runHook postInstall
+    # '';
+  };
+
+  # Adds a local package directory (e.g. a git repository) to Dub
+  dub-add-local = dubDep: "dub add-local ${(fromDub dubDep).src.outPath} ${rev-to-version dubDep.fetch.rev}";
+
+  # The target output of the Dub package
+  targetOf = package: "${package.targetPath or "."}/${package.targetName or package.name}";
+
+  # Remove reference to build tools and library sources
+  disallowedReferences = deps: [ dmd rdmd dub ] ++ builtins.map dep2src deps;
+
+  removeExpr = refs: ''remove-references-to ${lib.concatMapStrings (ref: " -t ${ref}") refs}'';
+
+in {
+  inherit fromDub;
+
+  mkDubDerivation = lib.makeOverridable ({
+    src,
+    nativeBuildInputs ? [],
+    dubJSON ? src + "/dub.json",
+    selections ? src + "/dub.selections.nix",
+    deps ? import selections,
+    passthru ? {},
+    package ? lib.importJSON dubJSON,
+    ...
+  } @ attrs: stdenv.mkDerivation (attrs // {
+
+    pname = package.name;
+
+    nativeBuildInputs = [ rdmd dmd dub pkgs.removeReferencesTo ] ++ nativeBuildInputs;
+    disallowedReferences = disallowedReferences deps;
+
+    passthru = passthru // {
+      inherit dub dmd rdmd pkgs;
+    };
+
+    src = lib.cleanSourceWith {
+      filter = filterDub;
+      src = lib.cleanSource src;
+    };
+
+    preFixup = ''
+      find $out/bin -type f -exec ${removeExpr (disallowedReferences deps)} '{}' + || true
+    '';
+
+    buildPhase = ''
+      runHook preBuild
+
+      export HOME=$PWD
+      ${lib.concatMapStringsSep "\n" dub-add-local deps}
+      dub build -b release --combined --skip-registry=all
+
+      runHook postBuild
+    '';
+
+    checkPhase = ''
+      runHook preCheck
+
+      export HOME=$PWD
+      ${lib.concatMapStringsSep "\n" dub-add-local deps}
+      dub test --combined --skip-registry=all
+
+      runHook postCheck
+    '';
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p $out/bin
+      cp -r "${targetOf package}" $out/bin
+
+      runHook postInstall
+    '';
+
+    meta = lib.optionalAttrs (package ? description) {
+      description = package.description;
+    } // attrs.meta or {};
+  } // lib.optionalAttrs (!(attrs ? version)) {
+    # Use name from dub.json, unless pname and version are specified
+    name = package.name;
+  }));
+}
diff --git a/nixDevEnv/dub/mkDub-ldc.nix b/nixDevEnv/dub/mkDub-ldc.nix
new file mode 100644
index 0000000..8fe20a3
--- /dev/null
+++ b/nixDevEnv/dub/mkDub-ldc.nix
@@ -0,0 +1,125 @@
+{ pkgs ? import <nixpkgs> {},
+  stdenv ? pkgs.stdenv,
+  rdmd ? pkgs.rdmd,
+  #dmd ? pkgs.dmd,
+  #gcc ? pkgs.gcc,
+  ldc ? pkgs.ldc,
+  dub ? pkgs.dub
+}:
+
+with stdenv;
+let
+  # Filter function to remove the .dub package folder from src
+  filterDub = name: type: let baseName = baseNameOf (toString name); in ! (
+    type == "directory" && baseName == ".dub"
+  );
+
+  # Convert a GIT rev string (tag) to a simple semver version
+  rev-to-version = builtins.replaceStrings ["v" "refs/tags/v"] ["" ""];
+
+  dep2src = dubDep: pkgs.fetchgit { inherit (dubDep.fetch) url rev sha256 fetchSubmodules; };
+
+  # Fetch a dependency (source only for now)
+  fromDub = dubDep: mkDerivation rec {
+    name = "${src.name}-${version}";
+    version = rev-to-version dubDep.fetch.rev;
+    nativeBuildInputs = [ rdmd ldc dub ];
+    src = dep2src dubDep;
+
+    buildPhase = ''
+      runHook preBuild
+      export HOME=$PWD
+      dub build -b=release
+      runHook postBuild
+    '';
+
+    # outputs = [ "lib" ];
+
+    # installPhase = ''
+    #   runHook preInstall
+    #   mkdir -p $out/bin
+    #   runHook postInstall
+    # '';
+  };
+
+  # Adds a local package directory (e.g. a git repository) to Dub
+  dub-add-local = dubDep: "dub add-local ${(fromDub dubDep).src.outPath} ${rev-to-version dubDep.fetch.rev}";
+
+  # The target output of the Dub package
+  targetOf = package: "${package.targetPath or "."}/${package.targetName or package.name}";
+
+  # Remove reference to build tools and library sources
+  disallowedReferences = deps: [ ldc rdmd dub ] ++ builtins.map dep2src deps;
+
+  removeExpr = refs: ''remove-references-to ${lib.concatMapStrings (ref: " -t ${ref}") refs}'';
+
+in {
+  inherit fromDub;
+
+  mkDubDerivation = lib.makeOverridable ({
+    src,
+    nativeBuildInputs ? [],
+    dubJSON ? src + "/dub.json",
+    selections ? src + "/dub.selections.nix",
+    deps ? import selections,
+    passthru ? {},
+    package ? lib.importJSON dubJSON,
+    ...
+  } @ attrs: stdenv.mkDerivation (attrs // {
+
+    pname = package.name;
+
+    nativeBuildInputs = [ rdmd ldc dub pkgs.removeReferencesTo ] ++ nativeBuildInputs;
+    disallowedReferences = disallowedReferences deps;
+
+    passthru = passthru // {
+      inherit dub ldc rdmd pkgs;
+    };
+
+    src = lib.cleanSourceWith {
+      filter = filterDub;
+      src = lib.cleanSource src;
+    };
+
+    preFixup = ''
+      find $out/bin -type f -exec ${removeExpr (disallowedReferences deps)} '{}' + || true
+    '';
+
+    buildPhase = ''
+      runHook preBuild
+
+      export HOME=$PWD
+      ${lib.concatMapStringsSep "\n" dub-add-local deps}
+      dub build --compiler=ldc2 --build=release --combined --skip-registry=all
+      #dub build -b optimize -b inline --combined --skip-registry=all
+
+      runHook postBuild
+    '';
+
+    checkPhase = ''
+      runHook preCheck
+
+      export HOME=$PWD
+      ${lib.concatMapStringsSep "\n" dub-add-local deps}
+      dub test --combined --skip-registry=all
+
+      runHook postCheck
+    '';
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p $out/bin
+      cp -r "${targetOf package}" $out/bin
+
+      runHook postInstall
+    '';
+
+    meta = lib.optionalAttrs (package ? description) {
+      description = package.description;
+    } // attrs.meta or {};
+  } // lib.optionalAttrs (!(attrs ? version)) {
+    # Use name from dub.json, unless pname and version are specified
+    name = package.name;
+  }));
+}
diff --git a/nixDevEnv/shells/dmd.nix b/nixDevEnv/shells/shell-dmd-verNix.nix
index 0c68cc0..a673c35 100644
--- a/nixDevEnv/shells/dmd.nix
+++ b/nixDevEnv/shells/shell-dmd-verNix.nix
@@ -1,4 +1,6 @@
-{ pkgs ? import <nixpkgs> { overlays = []; } }:
+{ pkgs ? import <nixpkgs>
+  { overlays = [ ]; }
+}:
 let
   dub2nix-src = fetchTarball {
     url = "https://github.com/lionello/dub2nix/archive/master.tar.gz";
diff --git a/nixDevEnv/shells/shell-dmd-verUser.nix b/nixDevEnv/shells/shell-dmd-verUser.nix
new file mode 100644
index 0000000..a673c35
--- /dev/null
+++ b/nixDevEnv/shells/shell-dmd-verUser.nix
@@ -0,0 +1,19 @@
+{ pkgs ? import <nixpkgs>
+  { overlays = [ ]; }
+}:
+let
+  dub2nix-src = fetchTarball {
+    url = "https://github.com/lionello/dub2nix/archive/master.tar.gz";
+  };
+  dub2nix = (import dub2nix-src) { inherit pkgs; };
+in pkgs.mkShell {
+  buildInputs = with pkgs; [
+    nix
+    dub
+    dmd
+    rdmd
+    sqlite
+    dub2nix
+    nix-prefetch-git
+  ];
+}
diff --git a/nixDevEnv/shells/shell-ldc-verNix.nix b/nixDevEnv/shells/shell-ldc-verNix.nix
new file mode 100644
index 0000000..094bfa7
--- /dev/null
+++ b/nixDevEnv/shells/shell-ldc-verNix.nix
@@ -0,0 +1,19 @@
+{ pkgs ? import <nixpkgs>
+  { overlays = [ ]; }
+}:
+let
+  dub2nix-src = fetchTarball {
+    url = "https://github.com/lionello/dub2nix/archive/master.tar.gz";
+  };
+  dub2nix = (import dub2nix-src) { inherit pkgs; };
+in pkgs.mkShell {
+  buildInputs = with pkgs; [
+    nix
+    dub
+    ldc
+    rdmd
+    sqlite
+    dub2nix
+    nix-prefetch-git
+  ];
+}
diff --git a/nixDevEnv/shells/ldc.nix b/nixDevEnv/shells/shell-ldc-verUser.nix
index 31cfcfb..8035327 100644
--- a/nixDevEnv/shells/ldc.nix
+++ b/nixDevEnv/shells/shell-ldc-verUser.nix
@@ -1,6 +1,6 @@
-{ pkgs ? import <nixpkgs> {
-  overlays = [
-    (import ./nixDevEnv/overlays/ldcVersion.nix)
+{ pkgs ? import <nixpkgs>
+  { overlays = [
+    (import ../overlays/ldcVersion.nix)
   ]; }
 }:
 let
diff --git a/org/spine_build_scaffold.org b/org/spine_build_scaffold.org
index 4470d00..55d74a2 100644
--- a/org/spine_build_scaffold.org
+++ b/org/spine_build_scaffold.org
@@ -70,6 +70,7 @@
 <<makefile_testrun_12>>
 <<makefile_tangle_0>>
 <<makefile_tangle_1>>
+<<makefile_nix_project_shell>>
 <<makefile_git_snapshot>>
 <<makefile_phony>>
 #+END_SRC
@@ -945,6 +946,30 @@ tangle_maker:
 			(kill-buffer)) '($$ORGFILES)))" 2>&1
 #+END_SRC
 
+#+NAME: makefile_nix_project_shell
+#+BEGIN_SRC makefile
+nixsh_dmd_nixpkg:
+	ln -sf nixDevEnv/shells/shell-dmd-verNix.nix shell.nix; \
+	ln -sf nixDevEnv/dub/mkDub-dmd.nix mkDub.nix; \
+	ls -la shell.nix mkDub.nix | cut -d " " -f 9-; \
+	nix-shell;
+nixsh_dmd_user:
+	ln -sf nixDevEnv/shells/shell-dmd-verUser.nix shell.nix; \
+	ln -sf nixDevEnv/dub/mkDub-dmd.nix mkDub.nix; \
+	ls -la shell.nix mkDub.nix | cut -d " " -f 9-; \
+	nix-shell;
+nixsh_ldc_nixpkg:
+	ln -sf nixDevEnv/shells/shell-ldc-verNix.nix shell.nix; \
+	ln -sf nixDevEnv/dub/mkDub-ldc.nix mkDub.nix; \
+	ls -la shell.nix mkDub.nix | cut -d " " -f 9-; \
+	nix-shell;
+nixsh_ldc_user:
+	ln -sf nixDevEnv/shells/shell-ldc-verUser.nix shell.nix; \
+	ln -sf nixDevEnv/dub/mkDub-ldc.nix mkDub.nix; \
+	ls -la shell.nix mkDub.nix | cut -d " " -f 9-; \
+	nix-shell;
+#+END_SRC
+
 *** git snapshot
 
 #+NAME: makefile_git_snapshot
@@ -1623,6 +1648,11 @@ tinyendian_dep = declare_dependency(
 #+END_SRC
 
 * nix
+
+- default.nix
+- shell.nix
+- dub2.nix
+
 ** dub2nix notes (from author (Lionello Lunesu) email reply, 2020-10-12)
 
 - https://github.com/lionello/dub2nix
@@ -1713,70 +1743,157 @@ fi
 #+END_SRC
 
 ** shells shell.nix
-*** nix-shell shell.nix
+*** dmd shell
 
-#+BEGIN_SRC nix :tangle ../shell.nix
-<<nix_shell_with_compiler_ldc>>
-#+END_SRC
+- ln -sf nixDevEnv/shells/shell-dmd-verNix.nix shell.nix
+- ln -sf nixDevEnv/shells/shell-dmd-verUser.nix shell.nix
 
-*** ldc shell
+- ln -sf nixDevEnv/dub/mkDub-dmd.nix mkDub.nix
+
+**** nixpkg
+
+- ln -sf nixDevEnv/shells/shell-dmd-verNix.nix shell.nix
+- ln -sf nixDevEnv/dub/mkDub-dmd.nix mkDub.nix
 
-#+BEGIN_SRC nix :tangle ../nixDevEnv/shells/ldc.nix
-<<nix_shell_with_compiler_ldc>>
+#+BEGIN_SRC nix :tangle ../nixDevEnv/shells/shell-dmd-verNix.nix
+{ pkgs ? import <nixpkgs>
+  <<nix_shell_overlay_none>>
+}:
+let
+  <<nix_shell_dub2nix>>
+in pkgs.mkShell {
+  <<nix_shell_buildInputs_dmd>>
+}
 #+END_SRC
 
-#+NAME: nix_shell_with_compiler_ldc
-#+BEGIN_SRC nix
-{ pkgs ? import <nixpkgs> {
-  overlays = [
-    (import ./nixDevEnv/overlays/ldcVersion.nix)
-  ]; }
+**** user
+
+- ln -sf nixDevEnv/shells/shell-dmd-verUser.nix shell.nix
+- ln -sf nixDevEnv/dub/mkDub-dmd.nix mkDub.nix
+
+#+BEGIN_SRC nix :tangle ../nixDevEnv/shells/shell-dmd-verUser.nix
+{ pkgs ? import <nixpkgs>
+  <<nix_shell_overlay_user_version_dmd>>
 }:
 let
-  dub2nix-src = fetchTarball {
-    url = "https://github.com/lionello/dub2nix/archive/master.tar.gz";
-  };
-  dub2nix = (import dub2nix-src) { inherit pkgs; };
+  <<nix_shell_dub2nix>>
 in pkgs.mkShell {
-  buildInputs = with pkgs; [
-    nix
-    dub
-    ldc
-    rdmd
-    sqlite
-    dub2nix
-    nix-prefetch-git
-  ];
+  <<nix_shell_buildInputs_dmd>>
 }
 #+END_SRC
 
-*** dmd shell
+*** ldc shell
+
+- ln -sf nixDevEnv/shells/shell-ldc-verNix.nix shell.nix
+- ln -sf nixDevEnv/shells/shell-ldc-verUser.nix shell.nix
+
+- ln -sf nixDevEnv/dub/mkDub-ldc.nix mkDub.nix
+
+**** nixpkg
 
-#+BEGIN_SRC nix :tangle ../nixDevEnv/shells/dmd.nix
-<<nix_shell_with_compiler_dmd>>
+- ln -sf nixDevEnv/shells/shell-ldc-verNix.nix shell.nix
+- ln -sf nixDevEnv/dub/mkDub-ldc.nix mkDub.nix
+
+#+BEGIN_SRC nix :tangle ../nixDevEnv/shells/shell-ldc-verNix.nix
+{ pkgs ? import <nixpkgs>
+  <<nix_shell_overlay_none>>
+}:
+let
+  <<nix_shell_dub2nix>>
+in pkgs.mkShell {
+  <<nix_shell_buildInputs_ldc>>
+}
 #+END_SRC
 
-#+NAME: nix_shell_with_compiler_dmd
-#+BEGIN_SRC nix
-{ pkgs ? import <nixpkgs> { overlays = []; } }:
+**** user
+
+- ln -sf nixDevEnv/shells/shell-ldc-verUser.nix shell.nix
+- ln -sf nixDevEnv/dub/mkDub-ldc.nix mkDub.nix
+
+#+BEGIN_SRC nix :tangle ../nixDevEnv/shells/shell-ldc-verUser.nix
+{ pkgs ? import <nixpkgs>
+  <<nix_shell_overlay_user_version_ldc>>
+}:
 let
-  dub2nix-src = fetchTarball {
-    url = "https://github.com/lionello/dub2nix/archive/master.tar.gz";
-  };
-  dub2nix = (import dub2nix-src) { inherit pkgs; };
+  <<nix_shell_dub2nix>>
 in pkgs.mkShell {
-  buildInputs = with pkgs; [
-    nix
-    dub
-    dmd
-    rdmd
-    sqlite
-    dub2nix
-    nix-prefetch-git
-  ];
+  <<nix_shell_buildInputs_ldc>>
 }
 #+END_SRC
 
+*** parts
+**** dub2nix
+
+#+NAME: nix_shell_dub2nix
+#+BEGIN_SRC nix
+dub2nix-src = fetchTarball {
+  url = "https://github.com/lionello/dub2nix/archive/master.tar.gz";
+};
+dub2nix = (import dub2nix-src) { inherit pkgs; };
+#+END_SRC
+
+**** overlays
+
+#+NAME: nix_shell_overlay_none
+#+BEGIN_SRC nix
+{ overlays = [ ]; }
+#+END_SRC
+
+***** (import ./nixDevEnv/overlays/dmdVersion.nix)
+
+no working overlay, default none:
+
+#+NAME: nix_shell_overlay_user_version_dmd
+#+BEGIN_SRC nix
+{ overlays = [ ]; }
+#+END_SRC
+
+use if working overlay:
+
+#+BEGIN_SRC nix
+{ overlays = [
+  (import ../overlays/dmdVersion.nix)
+]; }
+#+END_SRC
+
+***** (import ./nixDevEnv/overlays/ldcVersion.nix)
+
+#+NAME: nix_shell_overlay_user_version_ldc
+#+BEGIN_SRC nix
+{ overlays = [
+  (import ../overlays/ldcVersion.nix)
+]; }
+#+END_SRC
+
+
+**** build inputs
+
+#+NAME: nix_shell_buildInputs_dmd
+#+BEGIN_SRC nix
+buildInputs = with pkgs; [
+  nix
+  dub
+  dmd
+  rdmd
+  sqlite
+  dub2nix
+  nix-prefetch-git
+];
+#+END_SRC
+
+#+NAME: nix_shell_buildInputs_ldc
+#+BEGIN_SRC nix
+buildInputs = with pkgs; [
+  nix
+  dub
+  ldc
+  rdmd
+  sqlite
+  dub2nix
+  nix-prefetch-git
+];
+#+END_SRC
+
 *** dmd & ldc
 
 #+NAME: nix_shell_with_compilers_dmd_and_ldc
@@ -1843,7 +1960,135 @@ Get current mkDub.nix from the dub2nix project:
 aria2c https://raw.githubusercontent.com/lionello/dub2nix/master/mkDub.nix
 #+END_SRC
 
-#+BEGIN_SRC nix :tangle ../mkDub.nix
+*** mkDub dmd
+
+#+BEGIN_SRC nix :tangle ../nixDevEnv/dub/mkDub-dmd.nix
+{ pkgs ? import <nixpkgs> {},
+  stdenv ? pkgs.stdenv,
+  rdmd ? pkgs.rdmd,
+  dmd ? pkgs.dmd,
+  dub ? pkgs.dub }:
+
+with stdenv;
+let
+  # Filter function to remove the .dub package folder from src
+  filterDub = name: type: let baseName = baseNameOf (toString name); in ! (
+    type == "directory" && baseName == ".dub"
+  );
+
+  # Convert a GIT rev string (tag) to a simple semver version
+  rev-to-version = builtins.replaceStrings ["v" "refs/tags/v"] ["" ""];
+
+  dep2src = dubDep: pkgs.fetchgit { inherit (dubDep.fetch) url rev sha256 fetchSubmodules; };
+
+  # Fetch a dependency (source only for now)
+  fromDub = dubDep: mkDerivation rec {
+    name = "${src.name}-${version}";
+    version = rev-to-version dubDep.fetch.rev;
+    nativeBuildInputs = [ rdmd dmd dub ];
+    src = dep2src dubDep;
+
+    buildPhase = ''
+      runHook preBuild
+      export HOME=$PWD
+      dub build -b=release
+      runHook postBuild
+    '';
+
+    # outputs = [ "lib" ];
+
+    # installPhase = ''
+    #   runHook preInstall
+    #   mkdir -p $out/bin
+    #   runHook postInstall
+    # '';
+  };
+
+  # Adds a local package directory (e.g. a git repository) to Dub
+  dub-add-local = dubDep: "dub add-local ${(fromDub dubDep).src.outPath} ${rev-to-version dubDep.fetch.rev}";
+
+  # The target output of the Dub package
+  targetOf = package: "${package.targetPath or "."}/${package.targetName or package.name}";
+
+  # Remove reference to build tools and library sources
+  disallowedReferences = deps: [ dmd rdmd dub ] ++ builtins.map dep2src deps;
+
+  removeExpr = refs: ''remove-references-to ${lib.concatMapStrings (ref: " -t ${ref}") refs}'';
+
+in {
+  inherit fromDub;
+
+  mkDubDerivation = lib.makeOverridable ({
+    src,
+    nativeBuildInputs ? [],
+    dubJSON ? src + "/dub.json",
+    selections ? src + "/dub.selections.nix",
+    deps ? import selections,
+    passthru ? {},
+    package ? lib.importJSON dubJSON,
+    ...
+  } @ attrs: stdenv.mkDerivation (attrs // {
+
+    pname = package.name;
+
+    nativeBuildInputs = [ rdmd dmd dub pkgs.removeReferencesTo ] ++ nativeBuildInputs;
+    disallowedReferences = disallowedReferences deps;
+
+    passthru = passthru // {
+      inherit dub dmd rdmd pkgs;
+    };
+
+    src = lib.cleanSourceWith {
+      filter = filterDub;
+      src = lib.cleanSource src;
+    };
+
+    preFixup = ''
+      find $out/bin -type f -exec ${removeExpr (disallowedReferences deps)} '{}' + || true
+    '';
+
+    buildPhase = ''
+      runHook preBuild
+
+      export HOME=$PWD
+      ${lib.concatMapStringsSep "\n" dub-add-local deps}
+      dub build -b release --combined --skip-registry=all
+
+      runHook postBuild
+    '';
+
+    checkPhase = ''
+      runHook preCheck
+
+      export HOME=$PWD
+      ${lib.concatMapStringsSep "\n" dub-add-local deps}
+      dub test --combined --skip-registry=all
+
+      runHook postCheck
+    '';
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p $out/bin
+      cp -r "${targetOf package}" $out/bin
+
+      runHook postInstall
+    '';
+
+    meta = lib.optionalAttrs (package ? description) {
+      description = package.description;
+    } // attrs.meta or {};
+  } // lib.optionalAttrs (!(attrs ? version)) {
+    # Use name from dub.json, unless pname and version are specified
+    name = package.name;
+  }));
+}
+#+END_SRC
+
+*** mkDub ldc
+
+#+BEGIN_SRC nix :tangle ../nixDevEnv/dub/mkDub-ldc.nix
 { pkgs ? import <nixpkgs> {},
   stdenv ? pkgs.stdenv,
   rdmd ? pkgs.rdmd,
@@ -1995,7 +2240,7 @@ self: super: rec {
 
 **** dmdVersion.nix overlay
 
-no working overlay
+no working overlay, tangle to work on
 
 #+BEGIN_SRC nix :NO-tangle ../nixDevEnv/overlays/dmdVersion.nix
 self: super: rec {
diff --git a/shell.nix b/shell.nix
index 31cfcfb..fa9f1e2 100644..120000
--- a/shell.nix
+++ b/shell.nix
@@ -1,21 +1 @@
-{ pkgs ? import <nixpkgs> {
-  overlays = [
-    (import ./nixDevEnv/overlays/ldcVersion.nix)
-  ]; }
-}:
-let
-  dub2nix-src = fetchTarball {
-    url = "https://github.com/lionello/dub2nix/archive/master.tar.gz";
-  };
-  dub2nix = (import dub2nix-src) { inherit pkgs; };
-in pkgs.mkShell {
-  buildInputs = with pkgs; [
-    nix
-    dub
-    ldc
-    rdmd
-    sqlite
-    dub2nix
-    nix-prefetch-git
-  ];
-}
+nixDevEnv/shells/shell-ldc-verUser.nix
\ No newline at end of file