diff --git a/APLSource/Admin/Make.aplf b/APLSource/Admin/Make.aplf
index f036bde..cb24494 100644
--- a/APLSource/Admin/Make.aplf
+++ b/APLSource/Admin/Make.aplf
@@ -1,8 +1,12 @@
- Make flag
- :If 0=⎕SE.⎕NC'MakeHelpers'
-     'The package https://github.com/aplteam/MakeHelpers is required in ⎕SE'⎕SIGNAL 6
- :Else
-     :If flag
-         ⎕SE.MakeHelpers.CreateTatinPackageFromSingleScript ##.DotNetZip
-     :EndIf
+ Make flag;C;M;path;cfg;version;zipFilename
+ :If flag
+     C←##.CiderConfig ⋄ M←⎕SE.MakeHelpers
+     path←C.HOME,'/Dist/'
+     {}##.FilesAndDirs.RmDirByForce path
+     ##.FilesAndDirs.MkDir path
+     cfg←M.GetPackageCfg C.HOME
+     version←cfg M.HandleVersionNumber path
+     zipFilename←⎕SE.Tatin.BuildPackage C.HOME path version
+     ⎕←'*** New version build successfully:',(⎕UCS 13),'   ',zipFilename
  :EndIf
+ ⍝Done
diff --git a/APLSource/DotNetZip.aplc b/APLSource/DotNetZip.aplc
index 4a57096..5ceeafc 100644
--- a/APLSource/DotNetZip.aplc
+++ b/APLSource/DotNetZip.aplc
@@ -23,11 +23,13 @@
 
     ∇ r←Version
       :Access Public Shared
-      r←'DotNetZip' '2.0.2+68' '2022-05-31'
+      r←'DotNetZip' '2.1.0+67' '2023-02-01'
     ∇
 
     ∇ History
       :Access Public Shared
+    ⍝ * 2.1.0 from 2023-02-01
+    ⍝   * Constructor is now more resilient against a temporary "File is in use" problem.
     ⍝ * 2.0.2 from 2022-05-31
     ⍝   * Bug fixed in "Delete"
     ⍝ * 2.0.1 from 2022-05-20
@@ -84,25 +86,38 @@
     ⍝Done
     ∇
 
-    ∇ make(zipFilename overwriteFlag);stream
+    ∇ make(zipFilename overwriteFlag);stream;msg;flag;counter;doesExist
       CheckMinVersion ⍬
       Initialize ⍬
       zipFilename←AddExtension F.ExpandPath zipFilename
       QEX_System
-      :If F.Exists zipFilename
+      :If doesExist←F.Exists zipFilename
       :AndIf 0=overwriteFlag
-          :Trap 90
-              stream←System.IO.File.Open(zipFilename System.IO.FileMode.Open)
-          :Else
-              99 ⎕SIGNAL⍨{⍵↓⍨1+⍵⍳':'}{⍵↑⍨¯1+⌊/⍵⍳⎕UCS 10 13}∊⍕⎕EXCEPTION
-          :EndTrap
+          flag←counter←0
+          :Repeat
+              :Trap 90
+                  stream←System.IO.File.Open(zipFilename System.IO.FileMode.Open)
+                  flag←1
+              :Else
+                  msg←⍕⊃⎕EXCEPTION
+                  :If ~∨/'The process cannot access the file'⍷msg
+                  :OrIf 5=counter←counter+1
+                      99 ⎕SIGNAL⍨{⍵↓⍨1+⍵⍳':'}{⍵↑⍨¯1+⌊/⍵⍳⎕UCS 10 13}∊msg
+                  :Else
+                      ⎕DL 0.1
+                  :EndIf
+              :EndTrap
+          :Until flag
           _zip←QuadNEW System.IO.Compression.ZipArchive(stream System.IO.Compression.ZipArchiveMode.Update)
       :Else
-          F.DeleteFile zipFilename
+          :If doesExist
+              ('Cannot delete ',zipFilename)Assert F.DeleteFile zipFilename
+          :EndIf
           :Trap 90
               stream←System.IO.File.Open(zipFilename System.IO.FileMode.CreateNew)
           :Else
-              99 ⎕SIGNAL⍨{⍵↓⍨1+⍵⍳':'}{⍵↑⍨¯1+⌊/⍵⍳⎕UCS 10 13}∊⍕⎕EXCEPTION
+              msg←⍕⊃⎕EXCEPTION
+              99 ⎕SIGNAL⍨{⍵↓⍨1+⍵⍳':'}{⍵↑⍨¯1+⌊/⍵⍳⎕UCS 10 13}∊msg
           :EndTrap
           _zip←QuadNEW System.IO.Compression.ZipArchive(stream System.IO.Compression.ZipArchiveMode.Create)
           _zip.Dispose
diff --git a/apl-package.json b/apl-package.json
index d5ef460..c3c8f13 100644
--- a/apl-package.json
+++ b/apl-package.json
@@ -1 +1 @@
-{
  api: "DotNetZip",
  assets: "",
  date: "2021-03-01",
  description: "Zipping and unzipping with.NET Core on all major platforms",
  group: "aplteam",
  info_url: "https://github.com/aplteam/DotNetZip",
  io: 1,
  ml: 1,
  name: "DotNetZip",
  source: "DotNetZip.aplc",
  tags: "aplteam,zip-tools,windows,mac-os,linux;dyalog-apl",
  version: "2.0.2+68",
  wx: 3,
}
+{
  api: "DotNetZip",
  assets: "",
  date: "2021-03-01",
  description: "Zipping and unzipping with.NET Core on all major platforms",
  documentation: "",
  group: "aplteam",
  io: 1,
  lx: "",
  maintainer: "",
  minimumAplVersion: "18.0",
  ml: 1,
  name: "DotNetZip",
  os_lin: 0,
  os_mac: 0,
  os_win: 1,
  project_url: "https://github.com/aplteam/DotNetZip",
  source: "APLSource/DotNetZip.aplc",
  tags: "zip-tools",
  userCommandScript: "",
  version: "2.1.0+71",
}
diff --git a/cider.config b/cider.config
index 6c91639..0097d8b 100644
--- a/cider.config
+++ b/cider.config
@@ -1 +1 @@
-{
  CIDER: {
    githubUsername: "aplteam",
    info_url: "https://github.com/aplteam/DotNetZip",
    init: "",
    make: "Admin.Make 1",
    parent: "#",
    projectSpace: "DotNetZip",
    source: "APLSource",
    tatinFolder: "packages,packages_dev=TestCases",
    tests: "TestCases.RunTests",
  },
  LINK: {
    arrays: 0,
    beforeRead: "",
    beforeWrite: "",
    caseCode: 0,
    codeExtensions: [
      "aplf",
      "aplo",
      "apln",
      "aplc",
      "apli",
      "dyalog",
      "apl",
      "mipage",
    ],
    fastLoad: 0,
    flatten: 0,
    forceExtensions: 0,
    forceFilenames: 1,
    getFilename: "",
    typeExtensions: [
      [
        2,
        "apla",
      ],
      [
        3,
        "aplf",
      ],
      [
        4,
        "aplo",
      ],
      [
        9.1,
        "apln",
      ],
      [
        9.4,
        "aplc",
      ],
      [
        9.5,
        "apli",
      ],
    ],
    watch: "ns",
  },
  SYSVARS: {
    io: 1,
    ml: 1,
  },
  USER: {
  },
}
+{
  CIDER: {
    githubUsername: "aplteam",
    init: "",
    make: "Admin.Make 1",
    parent: "#",
    projectSpace: "DotNetZip",
    project_url: "https://github.com/aplteam/DotNetZip",
    source: "APLSource",
    tatinFolder: "packages,packages_dev=TestCases",
    tests: "TestCases.RunTests",
  },
  LINK: {
    arrays: 0,
    beforeRead: "",
    beforeWrite: "",
    caseCode: 0,
    codeExtensions: [
      "aplf",
      "aplo",
      "apln",
      "aplc",
      "apli",
      "dyalog",
      "apl",
      "mipage",
    ],
    fastLoad: 0,
    flatten: 0,
    forceExtensions: 0,
    forceFilenames: 1,
    getFilename: "",
    typeExtensions: [
      [
        2,
        "apla",
      ],
      [
        3,
        "aplf",
      ],
      [
        4,
        "aplo",
      ],
      [
        9.1,
        "apln",
      ],
      [
        9.4,
        "aplc",
      ],
      [
        9.5,
        "apli",
      ],
    ],
    watch: "ns",
  },
  SYSVARS: {
    io: 1,
    ml: 1,
  },
  USER: {
  },
}
diff --git a/packages/apl-buildlist.json b/packages/apl-buildlist.json
index a57492d..b555683 100644
--- a/packages/apl-buildlist.json
+++ b/packages/apl-buildlist.json
@@ -1 +1 @@
-{
  packageID: [
    "aplteam-FilesAndDirs-5.1.5",
    "aplteam-APLTreeUtils2-1.1.3",
    "aplteam-OS-3.0.1",
  ],
  principal: [
    1,
    1,
    0,
  ],
  url: [
    "https://tatin.dev/",
    "https://tatin.dev/",
    "https://tatin.dev/",
  ],
}
+{
  packageID: [
    "aplteam-FilesAndDirs-5.2.1",
    "aplteam-APLTreeUtils2-1.1.3",
    "aplteam-OS-3.0.1",
  ],
  principal: [
    1,
    1,
    0,
  ],
  url: [
    "https://tatin.dev/",
    "https://tatin.dev/",
    "https://tatin.dev/",
  ],
}
diff --git a/packages/apl-dependencies.txt b/packages/apl-dependencies.txt
index a5ad3b7..8a52c4c 100644
--- a/packages/apl-dependencies.txt
+++ b/packages/apl-dependencies.txt
@@ -1,2 +1,2 @@
 aplteam-APLTreeUtils2-1.1.3
-aplteam-FilesAndDirs-5.1.5
+aplteam-FilesAndDirs-5.2.1
diff --git a/packages_dev/apl-buildlist.json b/packages_dev/apl-buildlist.json
index 9421d9e..790d6f9 100644
--- a/packages_dev/apl-buildlist.json
+++ b/packages_dev/apl-buildlist.json
@@ -1 +1 @@
-{
  packageID: [
    "aplteam-Tester2-3.2.6",
    "aplteam-FilesAndDirs-5.1.5",
    "aplteam-CodeCoverage-0.9.1",
    "aplteam-APLTreeUtils2-1.1.3",
    "aplteam-OS-3.0.1",
    "aplteam-IniFiles-5.0.3",
  ],
  principal: [
    1,
    1,
    1,
    1,
    0,
    0,
  ],
  url: [
    "https://tatin.dev/",
    "https://tatin.dev/",
    "https://tatin.dev/",
    "https://tatin.dev/",
    "https://tatin.dev/",
    "https://tatin.dev/",
  ],
}
+{
  packageID: [
    "aplteam-Tester2-3.2.7",
    "aplteam-FilesAndDirs-5.2.1",
    "aplteam-CodeCoverage-0.9.3",
    "aplteam-APLTreeUtils2-1.1.3",
    "aplteam-OS-3.0.1",
    "aplteam-IniFiles-5.0.3",
  ],
  principal: [
    1,
    1,
    1,
    1,
    0,
    0,
  ],
  url: [
    "https://tatin.dev/",
    "https://tatin.dev/",
    "https://tatin.dev/",
    "https://tatin.dev/",
    "https://tatin.dev/",
    "https://tatin.dev/",
  ],
}
diff --git a/packages_dev/apl-dependencies.txt b/packages_dev/apl-dependencies.txt
index fb81b79..9eb4507 100644
--- a/packages_dev/apl-dependencies.txt
+++ b/packages_dev/apl-dependencies.txt
@@ -1,4 +1,4 @@
 aplteam-APLTreeUtils2-1.1.3
-aplteam-Tester2-3.2.6
-aplteam-CodeCoverage-0.9.1
-aplteam-FilesAndDirs-5.1.5
+aplteam-Tester2-3.2.7
+aplteam-CodeCoverage-0.9.3
+aplteam-FilesAndDirs-5.2.1