diff --git a/.github/workflows/Cabal-Linux.yml b/.github/workflows/Cabal-Linux.yml
index 94e91fd..2eacef0 100644
--- a/.github/workflows/Cabal-Linux.yml
+++ b/.github/workflows/Cabal-Linux.yml
@@ -12,7 +12,7 @@ on:
 jobs:
 
   build10:
-    name: GHC
+    name: "GHC"
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -21,7 +21,7 @@ jobs:
       - uses: actions/checkout@v2
         with:
           submodules: recursive
-      - name: Cache of ~/.cabal/packages, ~/.cabal/store and dist-newstyle
+      - name: "Cache of ~/.cabal/packages, ~/.cabal/store and dist-newstyle"
         uses: actions/cache@v2
         with:
           path: |
@@ -32,10 +32,10 @@ jobs:
       - uses: actions/setup-haskell@v1
         with:
           ghc-version: ${{ matrix.ghc }}
-      - name: Install additional system packages
+      - name: "Install additional system packages"
         run: sudo apt install libsodium-dev
       #  2020-08-01: NOTE: Nix instantiate still needed for HNix tests
-      - name: Install Nix
+      - name: "Install Nix"
         uses: cachix/install-nix-action@v12
       - run: cabal v2-configure --disable-optimization --enable-tests --enable-deterministic
       - run: cabal v2-build
diff --git a/.github/workflows/On-Readme-update.yml b/.github/workflows/On-Readme-update.yml
index c35d8aa..a4baaf5 100644
--- a/.github/workflows/On-Readme-update.yml
+++ b/.github/workflows/On-Readme-update.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     continue-on-error: true
     steps:
-      - name: Install doctoc
+      - name: "Install doctoc"
         run: |
           sudo npm install -g doctoc
       - uses: actions/checkout@v2
@@ -22,10 +22,10 @@ jobs:
           # 2020-09-29: Official doc:
           # "In non-push events, such as pull_request, make sure to specify the ref to checkout:'
           ref: ${{ github.head_ref }}
-      - name: Generate the idenpotent TOC
+      - name: "Generate the idenpotent TOC"
         run: |
           doctoc --github --notitle README.md
-      - name: Commit and push changes
+      - name: "Commit and push changes"
         uses: stefanzweifel/git-auto-commit-action@v4
         with:
           commit_author: "Anton Latukha <anton@latukha.com>"
diff --git a/.github/workflows/On-Release-Cabal-Linux.yml b/.github/workflows/On-Release-Cabal-Linux.yml
index 8dd3440..6a4faeb 100644
--- a/.github/workflows/On-Release-Cabal-Linux.yml
+++ b/.github/workflows/On-Release-Cabal-Linux.yml
@@ -8,7 +8,7 @@ on:
 jobs:
 
   build10:
-    name: GHC
+    name: "GHC"
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -29,10 +29,10 @@ jobs:
       - uses: actions/setup-haskell@v1
         with:
           ghc-version: ${{ matrix.ghc }}
-      - name: Install additional system packages
+      - name: "Install additional system packages"
         run: sudo apt install libsodium-dev
       #  2020-08-01: NOTE: Nix instantiate still needed for HNix tests
-      - name: Install Nix
+      - name: "Install Nix"
         uses: cachix/install-nix-action@v12
       - run: cabal v2-configure --disable-optimization --enable-tests --enable-deterministic
       - run: cabal v2-build
diff --git a/.github/workflows/On-Release-Nixpkgs-integration.yml b/.github/workflows/On-Release-Nixpkgs-integration.yml
new file mode 100644
index 0000000..2b7e6e0
--- /dev/null
+++ b/.github/workflows/On-Release-Nixpkgs-integration.yml
@@ -0,0 +1,27 @@
+name: "Direct import & build inside Nixpkgs"
+
+on:
+  release:
+    # created: a draft is saved, or a release or pre-release is published without previously being saved as a draft
+    types: [ created ]
+
+jobs:
+
+  build10:
+    name: "Clean integration test"
+    runs-on: ubuntu-latest
+    steps:
+    - name: "Git checkout"
+      uses: actions/checkout@v2
+    - name: "Local cache"
+      uses: actions/cache@v2
+      with:
+        path: |
+          /nix/store
+        key: ${{ runner.os }}-Nixpkgs-integration-test
+    - name: "Install Nix"
+      uses: cachix/install-nix-action@v12
+      with:
+        nix_path: "nixpkgs=channel:nixos-unstable"
+    - name: "Run Nixpkgs integration test"
+      uses: Anton-Latukha/test-haskell-nixpkgs-integration-action@v1
diff --git a/.github/workflows/Optional-Nix-dev-env-macOS.yml b/.github/workflows/Optional-Nix-dev-env-macOS.yml
index baf318f..3bdc589 100644
--- a/.github/workflows/Optional-Nix-dev-env-macOS.yml
+++ b/.github/workflows/Optional-Nix-dev-env-macOS.yml
@@ -24,18 +24,18 @@ jobs:
     runs-on: macos-latest
     continue-on-error: true
     steps:
-    - name: Git checkout
+    - name: "Git checkout"
       uses: actions/checkout@v2
       with:
         submodules: recursive
-    - name: Install Nix
+    - name: "Install Nix"
       uses: cachix/install-nix-action@v12
       with:
         nix_path: nixpkgs=channel:nixos-unstable
-    - name: Install Cachix
+    - name: "Install Cachix"
       uses: cachix/cachix-action@v7
       with:
         name: ${{ env.cachixAccount }}
         signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
-    - name: Determined Nix-build
+    - name: "Determined Nix-build"
       run: ./build.sh
diff --git a/.github/workflows/Optional-Nix-dev-env-main.yml b/.github/workflows/Optional-Nix-dev-env-main.yml
index 5ebd790..7a12bea 100644
--- a/.github/workflows/Optional-Nix-dev-env-main.yml
+++ b/.github/workflows/Optional-Nix-dev-env-main.yml
@@ -62,20 +62,20 @@ jobs:
     #  2020-08-01: NOTE: Due to Nixpkgs brittleness to not block project development Nixpkgs made optional, see commit message for more info
     continue-on-error: true
     steps:
-    - name: Git checkout
+    - name: "Git checkout"
       uses: actions/checkout@v2
       with:
         submodules: recursive
-    - name: Install Nix
+    - name: "Install Nix"
       uses: cachix/install-nix-action@v12
       with:
         nix_path: nixpkgs=channel:nixos-unstable
-    - name: Install Cachix
+    - name: "Install Cachix"
       uses: cachix/cachix-action@v7
       with:
         name: ${{ env.cachixAccount }}
         signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
-    - name: Determined Nix-build
+    - name: "Determined Nix-build"
       env:
         compiler: "default"
         buildStrictly: "true"
@@ -87,20 +87,20 @@ jobs:
     runs-on: ubuntu-latest
     continue-on-error: true
     steps:
-    - name: Git checkout
+    - name: "Git checkout"
       uses: actions/checkout@v2
       with:
         submodules: recursive
-    - name: Install Nix
+    - name: "Install Nix"
       uses: cachix/install-nix-action@v12
       with:
         nix_path: nixpkgs=channel:nixos-unstable
-    - name: Install Cachix
+    - name: "Install Cachix"
       uses: cachix/cachix-action@v7
       with:
         name: ${{ env.cachixAccount }}
         signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
-    - name: Determined Nix-build
+    - name: "Determined Nix-build"
       env:
         compiler: "ghc8101"
         buildFromSdist: "true"
@@ -119,22 +119,22 @@ jobs:
     runs-on: ubuntu-latest
     continue-on-error: true
     steps:
-    - name: Git checkout
+    - name: "Git checkout"
       uses: actions/checkout@v2
       with:
         submodules: recursive
-    - name: Install Nix
+    - name: "Install Nix"
       uses: cachix/install-nix-action@v12
       with:
         nix_path: nixpkgs=channel:nixos-unstable
-    - name: Install Cachix
+    - name: "Install Cachix"
       uses: cachix/cachix-action@v7
       with:
         name: ${{ env.cachixAccount }}
         signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
-    - name: Nix-shell
+    - name: "Nix-shell"
       run: nix-shell --pure --command 'echo "Evaluated, loaded and entered $IN_NIX_SHELL Nix shell env."'
-    - name: Local Hoogle DB for the project development and tooling
+    - name: "Local Hoogle DB for the project development and tooling"
       run: nix-shell --pure --command 'hoogle True'