diff --git a/.drom b/.drom
index 84398f89..9b7a01d7 100644
--- a/.drom
+++ b/.drom
@@ -5,7 +5,7 @@ version:0.9.0
 
 # hash of toml configuration files
 # used for generation of all files
-cfd502831bbf686b41df41219629c1c4:.
+812a88073a143fbfd65d11dd1ac586fd:.
 # end context for .
 
 # begin context for .github/workflows/workflow.yml
@@ -15,7 +15,7 @@ eee26f5d13b222b48706c4fcbd98a19a:.github/workflows/workflow.yml
 
 # begin context for .gitignore
 # file .gitignore
-f7a24abcad0ba9301c03bb64464b1718:.gitignore
+33c88a25e8b40f3683f6c03ec26be5db:.gitignore
 # end context for .gitignore
 
 # begin context for .ocamlformat
@@ -55,7 +55,7 @@ f7a24abcad0ba9301c03bb64464b1718:.gitignore
 
 # begin context for README.md
 # file README.md
-616ddd2660258447be65bdb664b9241d:README.md
+5d523350230459e853bc57803b729e29:README.md
 # end context for README.md
 
 # begin context for docs/README.txt
@@ -88,11 +88,31 @@ e739f3026aa997af4026bc428f4c9ef6:docs/favicon.png
 c8281f46ba9a11d0b61bc8ef67eaa357:docs/style.css
 # end context for docs/style.css
 
+# begin context for docs\README.txt
+# file docs\README.txt
+bfbacf00053bb9ab2a6e2ce94ed4a642:docs\README.txt
+# end context for docs\README.txt
+
+# begin context for docs\favicon.png
+# file docs\favicon.png
+e739f3026aa997af4026bc428f4c9ef6:docs\favicon.png
+# end context for docs\favicon.png
+
+# begin context for docs\style.css
+# file docs\style.css
+c8281f46ba9a11d0b61bc8ef67eaa357:docs\style.css
+# end context for docs\style.css
+
 # begin context for dot_gitattributes
 # file dot_gitattributes
 20bbe7a5dbb3c3278a1511d960616fe5:dot_gitattributes
 # end context for dot_gitattributes
 
+# begin context for dot_github\workflows\workflow.yml
+# file dot_github\workflows\workflow.yml
+004b92dd628d26b4f8a5a5139bf4aa79:dot_github\workflows\workflow.yml
+# end context for dot_github\workflows\workflow.yml
+
 # begin context for drom.toml
 # file drom.toml
 9949d65b87e55480a30122e9e77ae7d3:drom.toml
@@ -105,7 +125,7 @@ e850a13c004f963e9f5a568eac93c217:dune
 
 # begin context for dune-project
 # file dune-project
-c063288437da29a5a21e8c76c1906adc:dune-project
+7f0439af8599faf105447755ebd72e7e:dune-project
 # end context for dune-project
 
 # begin context for opam/drom.opam
@@ -143,6 +163,16 @@ e55d659410b556d7bc60183d8ff1f788:opam/drom_toml.opam
 cda3f8bad69d9c6e8cbeab1c720d739a:scripts/static-build.sh
 # end context for scripts/static-build.sh
 
+# begin context for scripts\after.sh
+# file scripts\after.sh
+cb2282903fb6ae1ac71fb2fbbcccffbd:scripts\after.sh
+# end context for scripts\after.sh
+
+# begin context for scripts\before.sh
+# file scripts\before.sh
+97c9b1f22a04f7c0b42477aee6f4393e:scripts\before.sh
+# end context for scripts\before.sh
+
 # begin context for sphinx/_static/css/fixes.css
 # file sphinx/_static/css/fixes.css
 68b329da9893e34099c7d8ad5cb9c940:sphinx/_static/css/fixes.css
@@ -173,6 +203,21 @@ a44c87f3a364dd95f55427fe40b2c5d1:sphinx/about.rst
 8f504f01aea592543c0a662b81169d91:sphinx/license.rst
 # end context for sphinx/license.rst
 
+# begin context for sphinx\conf.py
+# file sphinx\conf.py
+67496ee935ab27fdabb4544f4f81eeb6:sphinx\conf.py
+# end context for sphinx\conf.py
+
+# begin context for sphinx\license.rst
+# file sphinx\license.rst
+8f504f01aea592543c0a662b81169d91:sphinx\license.rst
+# end context for sphinx\license.rst
+
+# begin context for sphinx\under_static\css\fixes.css
+# file sphinx\under_static\css\fixes.css
+20bbe7a5dbb3c3278a1511d960616fe5:sphinx\under_static\css\fixes.css
+# end context for sphinx\under_static\css\fixes.css
+
 # begin context for src/drom/dune
 # file src/drom/dune
 68aec4169671c0163b98bb38205d2e4d:src/drom/dune
@@ -198,6 +243,11 @@ a44c87f3a364dd95f55427fe40b2c5d1:sphinx/about.rst
 bb6803d414fd5a5479ed6381914604de:src/drom/package.toml
 # end context for src/drom/package.toml
 
+# begin context for src/drom\index.mld
+# file src/drom\index.mld
+2818d15f527a37c2cfafe85ef89f675b:src/drom\index.mld
+# end context for src/drom\index.mld
+
 # begin context for src/drom_lib/dune
 # file src/drom_lib/dune
 103b365e9f24dbbae02b6be22b3efd0a:src/drom_lib/dune
@@ -218,6 +268,21 @@ c4d6597dc5b0966758c213bfffb9d594:src/drom_lib/package.toml
 a3e5d8a00664ceaa6addf376bedf6de1:src/drom_lib/version.mlt
 # end context for src/drom_lib/version.mlt
 
+# begin context for src/drom_lib\dune
+# file src/drom_lib\dune
+8c189e7a8bac651b008889b1dd38a8fe:src/drom_lib\dune
+# end context for src/drom_lib\dune
+
+# begin context for src/drom_lib\index.mld
+# file src/drom_lib\index.mld
+3e03ec5e98f99c1d5b09dd366177ad13:src/drom_lib\index.mld
+# end context for src/drom_lib\index.mld
+
+# begin context for src/drom_lib\version.mlt
+# file src/drom_lib\version.mlt
+a3e5d8a00664ceaa6addf376bedf6de1:src/drom_lib\version.mlt
+# end context for src/drom_lib\version.mlt
+
 # begin context for src/toml.7.1.0/dune
 # file src/toml.7.1.0/dune
 0841a2e47118b9fcd9b900f84ff66c34:src/toml.7.1.0/dune
@@ -243,6 +308,16 @@ d1b05207fce876a1b44a8b268bcaf226:src/toml.7.1.0/index.mld
 a3e5d8a00664ceaa6addf376bedf6de1:src/toml.7.1.0/version.mlt
 # end context for src/toml.7.1.0/version.mlt
 
+# begin context for src/toml.7.1.0\index.mld
+# file src/toml.7.1.0\index.mld
+d1b05207fce876a1b44a8b268bcaf226:src/toml.7.1.0\index.mld
+# end context for src/toml.7.1.0\index.mld
+
+# begin context for src/toml.7.1.0\version.mlt
+# file src/toml.7.1.0\version.mlt
+a3e5d8a00664ceaa6addf376bedf6de1:src/toml.7.1.0\version.mlt
+# end context for src/toml.7.1.0\version.mlt
+
 # begin context for test/expect-tests/dune
 # file test/expect-tests/dune
 d7e2675a767e30edf28d061c94f0ec62:test/expect-tests/dune
@@ -312,3 +387,13 @@ ee63957b3b77455a12e6c269a5032c3f:test/output-tests/test2.expected
 # file test/output-tests/test2.ml
 e8eaab7626ef0aace5e570fffe81f869:test/output-tests/test2.ml
 # end context for test/output-tests/test2.ml
+
+# begin context for test\inline-tests\test.ml
+# file test\inline-tests\test.ml
+37b8bc6035cda6302a80178c61f9626e:test\inline-tests\test.ml
+# end context for test\inline-tests\test.ml
+
+# begin context for test\output-tests\test1.expected
+# file test\output-tests\test1.expected
+dc8d6157230e9ef8e965865f990fbc49:test\output-tests\test1.expected
+# end context for test\output-tests\test1.expected
diff --git a/.gitignore b/.gitignore
index 4469f6e8..183b145f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 *~
 _build
 .merlin
+.vscode
 /_drom
 /_opam
 /_build
diff --git a/README.md b/README.md
index 5cd68cea..e8503f94 100644
--- a/README.md
+++ b/README.md
@@ -14,48 +14,3 @@ will generate files for Github Actions CI and Github pages.
 * General Documentation: https://ocamlpro.github.io/drom/sphinx
 * API Documentation: https://ocamlpro.github.io/drom/doc
 * Sources: https://github.com/ocamlpro/drom
-
-
-## Simple Example
-
-You can create a new OCaml project with:
-
-```
-$ drom new my-client --skeleton mini_prg
-Creating project "my-client" with skeleton "mini_prg", license "LGPL2"
-  and sources in src/my-client:
-Creating directory my-client
-Using skeleton "program" for package "my-client"
-[master (root-commit) 8d83262] Initial commit
-
-└── my-client/
-    ├── .drom             (drom state, do not edit)
-    ├── .github/
-    │   └── workflows/
-    │       └── workflow.yml
-    ├── .gitignore
-    ├── CHANGES.md
-    ├── LICENSE.md
-    ├── Makefile
-    ├── README.md
-    ├── drom.toml    <────────── project config EDIT !
-    ├── dune
-    ├── dune-project
-    ├── opam/
-    │   └── my-client.opam
-    ├── scripts/
-    │   ├── after.sh
-    │   ├── before.sh
-    │   └── copy-bin.sh
-    └── src/
-        └── my-client/
-            ├── dune
-            ├── main.ml
-            ├── package.toml    <────────── package config EDIT !
-            └── version.mlt
-```
-
-This project uses the minimalist `mini_prg` skeleton, but other skeletons
-like `program` or `library` have more files.
-
-
diff --git a/dot_github/workflows/workflow.yml b/dot_github/workflows/workflow.yml
new file mode 100644
index 00000000..5c7c8f41
--- /dev/null
+++ b/dot_github/workflows/workflow.yml
@@ -0,0 +1,105 @@
+name: Main Workflow
+
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        ocaml-compiler:
+          - 4.14.1
+        skip_test:
+          - false
+
+        include:
+          - os: ubuntu-latest
+            ocaml-compiler: 4.08.0
+            skip_test: true
+
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Retrieve opam cache
+        uses: actions/cache@v2
+        id: cache-opam
+        with:
+          path: ~/.opam
+          key: v2-${{ runner.os }}-drom-${{ matrix.ocaml-compiler }}-${{ hashFiles('opam/*.opam') }}
+#          restore-keys: |
+#            v2-${{ runner.os }}-opam-${{ matrix.ocaml-compiler }}-
+
+      - name: Use OCaml ${{ matrix.ocaml-compiler }}
+        uses: avsm/setup-ocaml@v2
+        with:
+          ocaml-compiler: ${{ matrix.ocaml-compiler }}
+          opam-pin: false
+          opam-depext: false
+
+      - name: Set git user
+        run: |
+          git config --global user.name github-actions
+          git config --global user.email github-actions-bot@users.noreply.github.com
+
+      # define opam-repo = "git+https://" to add an extra opam repo
+
+      - run: opam pin add . -y --no-action
+
+      - run: opam depext -y drom drom_lib drom_toml
+#        if: steps.cache-opam.outputs.cache-hit != 'true'
+
+      - run: opam install -y opam/*.opam --deps-only --with-test
+#        if: steps.cache-opam.outputs.cache-hit != 'true'
+
+#      - run: opam upgrade --fixup
+#        if: steps.cache-opam.outputs.cache-hit == 'true'
+
+      - run: dos2unix scripts/*.sh
+        if: matrix.os == 'windows-latest'
+
+      - run: make build
+
+      - name: run test suite
+        run: |
+          ./scripts/before.sh test
+          opam exec -- dune build @runtest
+          ./scripts/after.sh test
+        if: matrix.skip_test  != 'true'
+
+      - name: test source is well formatted
+        run: make fmt
+        continue-on-error: true
+        if: matrix.ocaml-compiler == '4.14.1' && matrix.os == 'ubuntu-latest'
+
+      - name: build-doc
+        if: github.ref == 'refs/heads/master' && matrix.ocaml-compiler == '4.14.1' && matrix.os == 'ubuntu-latest'
+        run: |
+             sudo apt install -yqq python3-sphinx python3-sphinx-rtd-theme
+             opam install -y dune odoc
+             make doc
+             touch _drom/docs/.nojekyll
+             touch _drom/docs/sphinx/.nojekyll
+             touch _drom/docs/doc/.nojekyll
+
+      - name: deploy-doc
+        uses: JamesIves/github-pages-deploy-action@3.6.2
+        if: github.ref == 'refs/heads/master' && matrix.ocaml-compiler == '4.14.1' && matrix.os == 'ubuntu-latest'
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          BRANCH: gh-pages
+          FOLDER: _drom/docs/
+          CLEAN: true
diff --git a/dune-project b/dune-project
index e4232f49..8afe42f5 100644
--- a/dune-project
+++ b/dune-project
@@ -1,5 +1,4 @@
 (lang dune 2.8)
-(using dune_site 0.1)
 ; This file was generated by drom, using drom.toml
 
 (cram enable)
@@ -52,6 +51,7 @@
    (ez_cmdliner (and (>= 0.2.0) (< 1.0.0)))
    (drom_toml (= version))
    (directories ( >= 0.2 ))
+   bos
    ppx_inline_test
    ppx_expect
    odoc
diff --git a/sphinx/under_static/css/fixes.css b/sphinx/under_static/css/fixes.css
new file mode 100644
index 00000000..e69de29b
diff --git a/src/drom_lib/dune b/src/drom_lib/dune
index bc43c911..a8a3cc4f 100644
--- a/src/drom_lib/dune
+++ b/src/drom_lib/dune
@@ -4,11 +4,7 @@
   (name drom_lib)
   (public_name drom_lib)
   (wrapped true)
-  ; use field 'dune-libraries' to add libraries without opam deps
-  (libraries ppx_protocol_conv otoml omd jingoo fmt ez_subst ez_opam_file ez_file ez_cmdliner drom_toml directories bigarray ppx_protocol_conv.runtime ppx_protocol_conv.driver)
-  ; use field 'dune-flags' to set this value
-  (flags (:standard))
-  ; use field 'dune-stanzas' to add more stanzas here
+  (libraries ppx_protocol_conv otoml omd jingoo fmt ez_subst ez_opam_file ez_file ez_cmdliner drom_toml directories bos bigarray ppx_protocol_conv.runtime ppx_protocol_conv.driver)
   
   (preprocess (pps ppx_deriving.show ppx_protocol_conv))
   )
@@ -22,5 +18,4 @@
 (documentation
   (package drom_lib))
 
-; use field 'dune-trailer' to add more stuff here
 
diff --git a/src/drom_lib/globals.ml b/src/drom_lib/globals.ml
index 4822cbff..92f2f77f 100644
--- a/src/drom_lib/globals.ml
+++ b/src/drom_lib/globals.ml
@@ -87,12 +87,20 @@ let find_ancestor_file file f =
   in
   iter dir ""
 
-let opam_root =
-  lazy
-    ( try Sys.getenv "OPAMROOT" with
-    | Not_found -> home_dir // ".opam" )
+(** [opam_root ()] returns the opam root directory.
+
+    @raise Error.Error if any error happens. *)
+let opam_root : unit -> string =
+  let compute = lazy begin
+    (* Don't use OPAMROOT or hardcoded directories. `opam` gives its own
+       way to give it. *)
+    let cmd = Bos.Cmd.(v "opam" % "var" % "root") in
+    match Bos.OS.Cmd.(run_out cmd |> to_string) with
+    | Ok dir -> dir
+    | Error _ -> Error.raise "%s: unknown error" __FUNCTION__
+  end in
+  fun () -> Lazy.force compute
 
-let opam_root () = Lazy.force opam_root
 
 let verbose_subst =
   try
diff --git a/src/drom_lib/package.toml b/src/drom_lib/package.toml
index 6fa769b6..b2d33cae 100644
--- a/src/drom_lib/package.toml
+++ b/src/drom_lib/package.toml
@@ -64,6 +64,7 @@ jingoo = ">=1.5.0"
 omd = ">=2.0"
 otoml = ">=1.0.4"
 ppx_protocol_conv = ">=5.2.1"
+bos = ">=0.2.1"
 
 # package tools dependencies
 [tools]