7 files changed, 57 insertions, 16 deletions
diff --git a/default.nix b/default.nix
index ebadd91..bf5940a 100644..100755
--- a/default.nix
+++ b/default.nix
@@ -1,3 +1,4 @@
+#!/usr/bin/env -S nix-build
 { pkgs ? import <nixpkgs> {},
   stdenv ? pkgs.stdenv,
 }:
@@ -6,7 +7,9 @@ mkDubDerivation rec {
   name = "spine-${version}";
   version = "0.11.1";
   src = ./.;
-  buildInputs = [ pkgs.sqlite ];
+  buildInputs = [
+    pkgs.sqlite
+  ];
   meta = with stdenv.lib; {
     homepage = http://sisudoc.org;
     description = "a sisu like document parser";
diff --git a/nixEnv/shells/shell-dmd-verNix.nix b/nixEnv/shells/shell-dmd-verNix.nix
index 7f16efe..cac08f4 100644..100755
--- a/nixEnv/shells/shell-dmd-verNix.nix
+++ b/nixEnv/shells/shell-dmd-verNix.nix
@@ -1,3 +1,4 @@
+#!/usr/bin/env -S nix-shell
 { pkgs ? import <nixpkgs> {} }:
 pkgs.mkShell {
   buildInputs = with pkgs; [
diff --git a/nixEnv/shells/shell-dmd-verUser.nix b/nixEnv/shells/shell-dmd-verUser.nix
index 334aece..4e40c0b 100644..100755
--- a/nixEnv/shells/shell-dmd-verUser.nix
+++ b/nixEnv/shells/shell-dmd-verUser.nix
@@ -1,3 +1,4 @@
+#!/usr/bin/env -S nix-shell
 { pkgs ? import <nixpkgs>
   { overlays = [ ]; }
 }:
diff --git a/nixEnv/shells/shell-ldc-verNix.nix b/nixEnv/shells/shell-ldc-verNix.nix
index 0a6aa9a..748f553 100644..100755
--- a/nixEnv/shells/shell-ldc-verNix.nix
+++ b/nixEnv/shells/shell-ldc-verNix.nix
@@ -1,5 +1,12 @@
+#!/usr/bin/env -S nix-shell
 { pkgs ? import <nixpkgs> {} }:
 pkgs.mkShell {
-  buildInputs = with pkgs;
-  [ (import ./packages-ldc.nix { inherit pkgs; }) ];
+  buildInputs = with pkgs; [
+    (import ./packages-ldc.nix { inherit pkgs; })
+  ];
+  shellHook = ''
+    # nix-build
+    ## nix-build -I nixpkgs=<provide local nix path>
+    ## nix-build -I nixpkgs=/nixpkgs-ra/nixpkgs
+  '';
 }
diff --git a/nixEnv/shells/shell-ldc-verUser.nix b/nixEnv/shells/shell-ldc-verUser.nix
index 1c9c092..d7f3267 100644..100755
--- a/nixEnv/shells/shell-ldc-verUser.nix
+++ b/nixEnv/shells/shell-ldc-verUser.nix
@@ -1,7 +1,14 @@
+#!/usr/bin/env -S nix-shell
 { pkgs ? import <nixpkgs> {
   overlays = [ (import ../overlays/ldcVersion.nix) ];
 } }:
 pkgs.mkShell {
-  buildInputs = with pkgs;
-  [ (import ./packages-ldc.nix { inherit pkgs; }) ];
+  buildInputs = with pkgs; [
+    (import ./packages-ldc.nix { inherit pkgs; })
+  ];
+  shellHook = ''
+    # nix-build
+    ## nix-build -I nixpkgs=<provide local nix path>
+    ## nix-build -I nixpkgs=/nixpkgs-ra/nixpkgs
+  '';
 }
diff --git a/org/spine_build_scaffold.org b/org/spine_build_scaffold.org
index a646763..dd043e2 100644
--- a/org/spine_build_scaffold.org
+++ b/org/spine_build_scaffold.org
@@ -1773,7 +1773,9 @@ in mkShell {
 with import ./mkDub.nix { inherit pkgs; };
 mkDubDerivation {
     src = ./.;
-    buildInputs = [ pkgs.sqlite ];
+    buildInputs = [
+      pkgs.sqlite
+    ];
 }
 #+END_SRC
 
@@ -1807,6 +1809,11 @@ fi
 #+END_SRC
 
 ** shells shell.nix SELECT :shell:
+
+  nix-shell
+  nix-shell --pure -I nixpkgs=/nixpkgs-ra/nixpkgs
+   nix-shell --pure -p "with import /nixpkgs-ra/nixpkgs {}; ldc"
+
 *** dmd shell :dmd:
 
 - ln -sf nixEnv/shells/shell-dmd-verNix.nix shell.nix
@@ -1819,7 +1826,7 @@ fi
 - ln -sf nixEnv/shells/shell-dmd-verNix.nix shell.nix
 - ln -sf nixEnv/dub/mkDub-dmd.nix mkDub.nix
 
-#+BEGIN_SRC nix :tangle ../nixEnv/shells/shell-dmd-verNix.nix
+#+BEGIN_SRC nix :tangle ../nixEnv/shells/shell-dmd-verNix.nix :tangle-mode (identity #o755) :shebang "#!/usr/bin/env -S nix-shell"
 { pkgs ? import <nixpkgs> {} }:
 <<nix_shell_mkshell_with_buildInputs_dmd>>
 #+END_SRC
@@ -1829,7 +1836,7 @@ fi
 - ln -sf nixEnv/shells/shell-dmd-verUser.nix shell.nix
 - ln -sf nixEnv/dub/mkDub-dmd.nix mkDub.nix
 
-#+BEGIN_SRC nix :tangle ../nixEnv/shells/shell-dmd-verUser.nix
+#+BEGIN_SRC nix :tangle ../nixEnv/shells/shell-dmd-verUser.nix :tangle-mode (identity #o755) :shebang "#!/usr/bin/env -S nix-shell"
 <<nix_shell_overlay_user_version_dmd>>
 <<nix_shell_mkshell_with_buildInputs_dmd>>
 #+END_SRC
@@ -1846,7 +1853,7 @@ fi
 - ln -sf nixEnv/shells/shell-ldc-verNix.nix shell.nix
 - ln -sf nixEnv/dub/mkDub-ldc.nix mkDub.nix
 
-#+BEGIN_SRC nix :tangle ../nixEnv/shells/shell-ldc-verNix.nix
+#+BEGIN_SRC nix :tangle ../nixEnv/shells/shell-ldc-verNix.nix :tangle-mode (identity #o755) :shebang "#!/usr/bin/env -S nix-shell"
 { pkgs ? import <nixpkgs> {} }:
 <<nix_shell_mkshell_with_buildInputs_ldc>>
 #+END_SRC
@@ -1856,7 +1863,7 @@ fi
 - ln -sf nixEnv/shells/shell-ldc-verUser.nix shell.nix
 - ln -sf nixEnv/dub/mkDub-ldc.nix mkDub.nix
 
-#+BEGIN_SRC nix :tangle ../nixEnv/shells/shell-ldc-verUser.nix
+#+BEGIN_SRC nix :tangle ../nixEnv/shells/shell-ldc-verUser.nix :tangle-mode (identity #o755) :shebang "#!/usr/bin/env -S nix-shell"
 <<nix_shell_overlay_user_version_ldc>>
 <<nix_shell_mkshell_with_buildInputs_ldc>>
 #+END_SRC
@@ -1875,8 +1882,14 @@ fi
 #+NAME: nix_shell_mkshell_with_buildInputs_ldc
 #+BEGIN_SRC nix
 pkgs.mkShell {
-  buildInputs = with pkgs;
-  [ (import ./packages-ldc.nix { inherit pkgs; }) ];
+  buildInputs = with pkgs; [
+    (import ./packages-ldc.nix { inherit pkgs; })
+  ];
+  shellHook = ''
+    # nix-build
+    ## nix-build -I nixpkgs=<provide local nix path>
+    ## nix-build -I nixpkgs=/nixpkgs-ra/nixpkgs
+  '';
 }
 #+END_SRC
 
@@ -1994,7 +2007,12 @@ in pkgs.mkShell {
 
 ** default.nix :default:
 
-#+BEGIN_SRC txt :tangle ../default.nix
+- default.nix -I nixpkgs=<provide local nix path>
+  e.g. default.nix -I nixpkgs=/nixpkgs-ra/nixpkgs
+- nix-build -I nixpkgs=<provide local nix path>
+  e.g. nix-build -I nixpkgs=/nixpkgs-ra/nixpkgs
+
+#+BEGIN_SRC txt :tangle ../default.nix :tangle-mode (identity #o755) :shebang "#!/usr/bin/env -S nix-build"
 <<nix_project>>
 #+END_SRC
 
@@ -2012,7 +2030,9 @@ mkDubDerivation rec {
   name = "spine-${version}";
   version = "<<version_spine>>";
   src = ./.;
-  buildInputs = [ pkgs.sqlite ];
+  buildInputs = [
+    pkgs.sqlite
+  ];
   meta = with stdenv.lib; {
     homepage = http://sisudoc.org;
     description = "a sisu like document parser";
@@ -2456,7 +2476,7 @@ babel tangle) org files in ./org/ to create .d source files in ./src/doc_reform/
 (similar functionality is contained within the "makefile" created by this
 "dr_build_scaffold.org" file make tangle)
 
-#+BEGIN_SRC sh :tangle ../tangle :tangle-mode (identity #o755) :shebang #!/bin/sh
+#+BEGIN_SRC sh :tangle ../tangle :tangle-mode (identity #o755) :shebang "#!/bin/sh"
 # -*- mode: shell-script -*-
 # tangle files with org-mode
 DIR=`pwd`
diff --git a/project.nix b/project.nix
index ebadd91..9b335e3 100644
--- a/project.nix
+++ b/project.nix
@@ -6,7 +6,9 @@ mkDubDerivation rec {
   name = "spine-${version}";
   version = "0.11.1";
   src = ./.;
-  buildInputs = [ pkgs.sqlite ];
+  buildInputs = [
+    pkgs.sqlite
+  ];
   meta = with stdenv.lib; {
     homepage = http://sisudoc.org;
     description = "a sisu like document parser";