diff --git a/README.md b/README.md
index a4a7852..b228c9a 100644
--- a/README.md
+++ b/README.md
@@ -25,9 +25,7 @@ pip install --editable git://github.com/elonen/lanscatter.git#egg=lanscatter
 ```
 git clone git+ssh://git@github.com/elonen/lanscatter.git
 cd lanscatter
-python3.7 -m venv venv
-source venv/bin/activate
-python setup.py develop
+./init-env.sh    # on Windows requires Mingw (Git Bash) or Cygwin
 ```
 
 Either way, you can now type `lanscatter_master`, `lanscatter_peer` or `lanscatter_gui` on the command line.
@@ -105,7 +103,7 @@ Notable modules:
 
 ## Testing
 
-The `tests` folder contains integration and unit tests using the _pytest_ framework.
+The `tests` folder contains integration and unit tests using the _pytest_ framework; simply the environment and run `pytest`.
 
 Integration test – in short – runs a master node and several peer node simultaneously, with random sync dir contents, and makes sure they get in sync without errors.
 
@@ -161,6 +159,11 @@ Numbers on the right show current downloads, current uploads and average time it
 
 See `planner.plan_transfers()` for details on how planning algorithm works.
 
+## Building
+
+Being a Python package, Lanscatter doesn't require building, but if you want to package .exe binaries for
+Windows , run `pyinstaller-build.sh` in _Git Bash_ (Mingw) or Cygwin.
+
 ## License
 
 Copyright 2019 Jarno Elonen <elonen@iki.fi>
diff --git a/init-env.sh b/init-env.sh
index 838bf0b..04a1cbb 100755
--- a/init-env.sh
+++ b/init-env.sh
@@ -1,12 +1,30 @@
 #!/bin/bash
+set -e
+
+PYTHON=python3.7
+REQ=requirements.txt
+ACTIVATE=venv/bin/activate
+
+if (uname | grep -q -E '(CYGWIN|MINGW)'); then
+  echo "NOTE: Windows OS detected. Using 'python' instead of '$PYTHON'."
+  PYTHON=python
+  ACTIVATE=venv/Scripts/activate
+fi
+
+if (uname | grep -q -E 'Linux'); then
+  echo "NOTE: Linux OS detected. Skipping installing GUI packages (failing ATM)."
+  REQ=requirements.cli.txt
+fi
+
 if [ ! -e venv ]; then
-  python3.7 -m venv venv
+  $PYTHON -m venv venv
 fi
-source venv/bin/activate || { echo "Venv activation failed."; exit 1; }
-pip install -r requirements.txt
+
+source $ACTIVATE || { echo "Venv activation failed."; exit 1; }
+pip install -r $REQ
 python ./setup.py develop
 
 echo " "
 echo "---"
-echo "Done. First run 'source venv/bin/activate'"
+echo "Done. First run 'source $ACTIVATE'"
 echo "Then try 'lanscatter_master --help', 'lanscatter_peer' or 'lanscatter_gui'."
diff --git a/lanscatter/common.py b/lanscatter/common.py
index d532282..70df886 100644
--- a/lanscatter/common.py
+++ b/lanscatter/common.py
@@ -21,7 +21,7 @@ class Defaults:
     CONCURRENT_TRANSFERS_PEER = 2
     DIR_SCAN_INTERVAL_PEER = 60
 
-    APP_VERSION = '0.1.0'
+    APP_VERSION = '0.1.1'
     PROTOCOL_VERSION = '1.0.0'
 
 
diff --git a/pyinstaller-build.bat b/pyinstaller-build.bat
deleted file mode 100644
index acb6b9b..0000000
--- a/pyinstaller-build.bat
+++ /dev/null
@@ -1,10 +0,0 @@
-IF NOT EXIST venv (python -m venv venv)
-CALL venv\Scripts\activate
-venv\Scripts\pip install -r requirements.txt
-venv\Scripts\python ./setup.py develop
-venv\Scripts\python setup.py pyinstaller -- --noconsole --onefile --add-data "gfx/*;gfx" --icon gfx/icon.ico
-copy dist\lanscatter_gui.exe .\
-del /S dist /Q
-venv\Scripts\python setup.py pyinstaller -- --onefile
-copy dist\lanscatter_master.exe .\
-copy dist\lanscatter_peer.exe .\
diff --git a/pyinstaller-build.sh b/pyinstaller-build.sh
index 32dc228..51545d9 100755
--- a/pyinstaller-build.sh
+++ b/pyinstaller-build.sh
@@ -1,9 +1,46 @@
 #!/bin/bash
-if [ ! -e venv ]; then
-  python3.7 -m venv venv
+PYTHON=python3.7
+REQ=requirements.txt
+ACTIVATE=venv/bin/activate
+set -e
+
+VER=$(git describe --exact-match 2> /dev/null || echo "`git symbolic-ref HEAD 2> /dev/null | cut -b 12-`-`git log --pretty=format:\"%h\" -1`")
+echo "Current version string is: '$VER'"
+
+if (uname | grep -q -E '(CYGWIN|MINGW)'); then
+  echo "NOTE: Windows OS detected. Using 'python' instead of '$PYTHON'."
+  PYTHON=python
+  ACTIVATE=venv/Scripts/activate
 fi
-source venv/bin/activate || { echo "Venv activation failed."; exit 1; }
-pip install -r requirements.txt
+
+if (uname | grep -q -E 'Linux'); then
+  echo "NOTE: Linux OS detected. Skipping installing GUI packages (failing ATM)."
+  REQ=requirements.cli.txt
+fi
+
+source $ACTIVATE || { echo "Venv activation failed."; exit 1; }
+pip install -r $REQ
+
+echo " "
 pytest || { echo "Tests failed, will not continue with pyinstaller."; exit 1; }
 python ./setup.py develop
-python ./setup.py pyinstaller -- --noconsole --onefile --add-data 'gfx/*:gfx' --icon gfx/icon.ico
+
+if (uname | grep -q -E '(CYGWIN|MINGW)'); then
+  ZIPFILE="lanscatter-win32_$VER.zip"
+  python setup.py pyinstaller -- --noconsole --onefile --add-data "gfx/*;gfx" --icon gfx/icon.ico
+  cp dist/lanscatter_gui.exe ./
+  rm -rf dist
+  python setup.py pyinstaller -- --onefile
+  cp dist/lanscatter_master.exe dist/lanscatter_peer.exe ./
+  rm -f lanscatter-win32.zip
+  python -c "import zipfile, glob; z=zipfile.ZipFile('$ZIPFILE', 'w'); [z.write(f) for f in glob.glob('*.exe')]"
+  rm -- *.exe
+  echo "--- DONE. Windows binaries built and packaged into $ZIPFILE"
+
+else
+  echo "--- NOTE: We are not on Windows, so binaries will stay in dist/."
+  python ./setup.py pyinstaller -- --noconsole --onefile --add-data 'gfx/*:gfx' --icon gfx/icon.ico
+fi
+
+rm -rf dist
+rm -f lanscatter_*.spec