diff --git a/.github/workflows/ccpp_mac.yml b/.github/workflows/ccpp_mac.yml
index a8f011329..61a6ecbc2 100644
--- a/.github/workflows/ccpp_mac.yml
+++ b/.github/workflows/ccpp_mac.yml
@@ -59,11 +59,12 @@ jobs:
       run: |
         cp -f src/slic3r++ Slic3r++/Slic3r++.app/Contents/MacOS/slic3r++
         chmod u+x Slic3r++/Slic3r++.app/Contents/MacOS/slic3r++
-        tar -zcvf slic3r++.tar.gz Slic3r++
+        tar -cvf slic3r++.tar Slic3r++
     - name: create dmg
       working-directory: ./build
       run: |
-        hdiutil create -ov -format UDZO -volname "Slic3rPP" -srcfolder "Slic3r++" Slic3r++.dmg
+        hdiutil create -ov -fs HFS+ -volname "Slic3r++" -srcfolder "Slic3r++" temp.dmg
+        hdiutil convert temp.dmg -format UDZO -o Slic3r++.dmg
 #    - name: signing resources (creating CodeResources inside _CodeSignature)
 #      working-directory: .
 #      run: codesign -s <identity> resources
@@ -71,10 +72,10 @@ jobs:
     - name: Upload artifact
       uses: actions/upload-artifact@v1.0.0
       with:
-        name: nightly_macos_targz
-        path: build/slic3r++.tar.gz
+        name: nightly_macos.tar
+        path: build/slic3r++.tar
     - name: Upload artifact
       uses: actions/upload-artifact@v1.0.0
       with:
-        name: nightly_macos
+        name: nightly_macos.dmg
         path: build/Slic3r++.dmg
diff --git a/.github/workflows/ccpp_ubuntu.yml b/.github/workflows/ccpp_ubuntu.yml
index 8b92bbb6b..02213294a 100644
--- a/.github/workflows/ccpp_ubuntu.yml
+++ b/.github/workflows/ccpp_ubuntu.yml
@@ -14,10 +14,10 @@ jobs:
     - uses: actions/checkout@v1
     - name: change date in version
       run: sed -i "s/+UNKNOWN/_$(date '+%F')/" version.inc
-    - name: update apt
-      run: sudo apt update
     - name: update clock
       run: sudo hwclock -s
+    - name: update apt
+      run: sudo apt update
     - name: install gtk2 glew
       run: sudo apt install libgtk2.0-dev libglew-dev libudev-dev
     - name: mkdir in deps
@@ -55,9 +55,9 @@ jobs:
       run: |
         echo -e '#!/bin/bash\nDIR=$(readlink -f "$0" | xargs dirname)\nexport LD_LIBRARY_PATH="$DIR/bin"\nexec "$DIR/bin/slic3r++" "$@"' >slic3r++
         chmod u+x slic3r++
-        tar -zcvf ../slic3r++.tar.gz .
+        tar -cvf ../slic3r++.tar .
     - name: Upload artifact
       uses: actions/upload-artifact@v1.0.0
       with:
         name: nightly_linux
-        path: build/slic3r++.tar.gz
+        path: build/slic3r++.tar