diff --git a/.travis.yml b/.travis.yml
index 42bcdc8ab..fef9701bc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -58,10 +58,8 @@ jobs:
         - sudo apt-get update
         - sudo apt-get -y -o Dpkg::Options::="--force-confnew" install docker-ce
         - docker version
-      install:
-        - sudo docker build --no-cache -t electrum-wine-builder-img ./contrib/build-wine/
       script:
-        - sudo docker run --name electrum-wine-builder-cont -v $PWD:/opt/wine64/drive_c/electrum --rm --workdir /opt/wine64/drive_c/electrum/contrib/build-wine electrum-wine-builder-img ./make_win.sh
+        - ELECBUILD_COMMIT=HEAD ./contrib/build-wine/build.sh
       after_success: true
     - if: (branch = master) OR (tag IS present)
       name: "Android build"
@@ -69,13 +67,11 @@ jobs:
       python: 3.7
       services:
         - docker
-      install:
-        - ./contrib/android/build_docker_image.sh
       script:
         - sudo chown -R 1000:1000 .
         # Output something every minute or Travis kills the job
         - while sleep 60; do echo "=====[ $SECONDS seconds still running ]====="; done &
-        - sudo docker run -it -u 1000:1000 --rm --name electrum-android-builder-cont --env CI=true -v $PWD:/home/user/wspace/electrum --workdir /home/user/wspace/electrum electrum-android-builder-img ./contrib/android/make_apk
+        - ELECBUILD_COMMIT=HEAD ./contrib/android/build.sh
         # kill background sleep loop
         - kill %1
         - ls -la dist
@@ -100,10 +96,8 @@ jobs:
       python: false
       services:
         - docker
-      install:
-        - sudo docker build --no-cache -t electrum-appimage-builder-img ./contrib/build-linux/appimage/
       script:
-        - sudo docker run --name electrum-appimage-builder-cont -v $PWD:/opt/electrum --rm --workdir /opt/electrum/contrib/build-linux/appimage electrum-appimage-builder-img ./make_appimage.sh
+        - ELECBUILD_COMMIT=HEAD ./contrib/build-linux/appimage/build.sh
       after_success: true
     - if: (branch = master) OR (tag IS present)
       name: "tarball build"
@@ -111,19 +105,8 @@ jobs:
       python: false
       services:
         - docker
-      before_install:
-        # hack: travis already cloned the repo, but we re-clone now, as we need to have umask set BEFORE cloning
-        - umask 0022
-        - mkdir fresh_clone && cd fresh_clone
-        - git clone https://github.com/$TRAVIS_REPO_SLUG.git && cd electrum
-        - if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then git fetch origin pull/$TRAVIS_PULL_REQUEST/merge; fi
-        - git checkout $TRAVIS_COMMIT
-        - echo "Second git clone ready at $PWD"
-      install:
-        - sudo docker build --no-cache -t electrum-sdist-builder-img ./contrib/build-linux/sdist/
       script:
-        - echo "Building sdist at $PWD"
-        - sudo docker run --name electrum-sdist-builder-cont -v $PWD:/opt/electrum --rm --workdir /opt/electrum/contrib/build-linux/sdist electrum-sdist-builder-img ./make_sdist.sh
+        - ELECBUILD_COMMIT=HEAD ./contrib/build-linux/sdist/build.sh
       after_success: true
     - stage: release check
       install:
diff --git a/contrib/android/Readme.md b/contrib/android/Readme.md
index b61cc7291..9ecaebd26 100644
--- a/contrib/android/Readme.md
+++ b/contrib/android/Readme.md
@@ -9,8 +9,7 @@ To generate an APK file, follow these instructions.
    binaries that match the official releases._
 
 This assumes an Ubuntu (x86_64) host, but it should not be too hard to adapt to another
-similar system. The docker commands should be executed in the project's root
-folder.
+similar system.
 
 1. Install Docker
 
@@ -21,47 +20,20 @@ folder.
     $ sudo apt-get install -y docker-ce
     ```
 
-2. Build image
+2. Build binaries
 
     ```
-    $ ./contrib/android/build_docker_image.sh
+    $ ./build.sh
     ```
-
-3. Build binaries
-
-    It's recommended to build from a fresh clone
-    (but you can skip this if reproducibility is not necessary).
-
+    If you want reproducibility, try instead e.g.:
     ```
-    $ FRESH_CLONE="contrib/android/fresh_clone/electrum" && \
-        sudo rm -rf "$FRESH_CLONE" && \
-        umask 0022 && \
-        git clone . "$FRESH_CLONE" && \
-        cd "$FRESH_CLONE"
+    $ ELECBUILD_COMMIT=HEAD ELECBUILD_NOCACHE=1 ./build.sh release-unsigned
     ```
-
-    And then build from this directory:
-    ```
-    $ git checkout $REV
-    $ mkdir --parents $PWD/.buildozer/.gradle
-    $ sudo docker run -it --rm \
-        --name electrum-android-builder-cont \
-        -v $PWD:/home/user/wspace/electrum \
-        -v $PWD/.buildozer/.gradle:/home/user/.gradle \
-        -v ~/.keystore:/home/user/.keystore \
-        --workdir /home/user/wspace/electrum \
-        electrum-android-builder-img \
-        ./contrib/android/make_apk
-    ```
-    
-    Note: this builds a debug apk. `make_apk` takes an optional parameter
-    which can be either `release` or `release-unsigned`.
     
-    This mounts the project dir inside the container,
-    and so the modifications will affect it, e.g. `.buildozer` folder
-    will be created.
+    Note: `build.sh` takes an optional parameter which can be
+    `release`, `release-unsigned`, or `debug` (default).
 
-5. The generated binary is in `./dist`.
+3. The generated binary is in `./dist`.
 
 
 ## Verifying reproducibility and comparing against official binary
diff --git a/contrib/android/build.sh b/contrib/android/build.sh
new file mode 100755
index 000000000..f199eb533
--- /dev/null
+++ b/contrib/android/build.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+#
+# env vars:
+# - ELECBUILD_NOCACHE: if set, forces rebuild of docker image
+# - ELECBUILD_COMMIT: if set, do a fresh clone and git checkout
+
+set -e
+
+PROJECT_ROOT="$(dirname "$(readlink -e "$0")")/../.."
+PROJECT_ROOT_OR_FRESHCLONE_ROOT="$PROJECT_ROOT"
+CONTRIB="$PROJECT_ROOT/contrib"
+CONTRIB_ANDROID="$CONTRIB/android"
+DISTDIR="$PROJECT_ROOT/dist"
+
+. "$CONTRIB"/build_tools_util.sh
+
+
+DOCKER_BUILD_FLAGS=""
+if [ ! -z "$ELECBUILD_NOCACHE" ] ; then
+    info "ELECBUILD_NOCACHE is set. forcing rebuild of docker image."
+    DOCKER_BUILD_FLAGS="--pull --no-cache"
+fi
+
+info "building docker image."
+cp "$CONTRIB/deterministic-build/requirements-build-android.txt" "$CONTRIB_ANDROID/requirements-build-android.txt"
+sudo docker build \
+    $DOCKER_BUILD_FLAGS \
+    -t electrum-android-builder-img \
+    "$CONTRIB_ANDROID"
+rm "$CONTRIB_ANDROID/requirements-build-android.txt"
+
+
+# maybe do fresh clone
+if [ ! -z "$ELECBUILD_COMMIT" ] ; then
+    info "ELECBUILD_COMMIT=$ELECBUILD_COMMIT. doing fresh clone and git checkout."
+    FRESH_CLONE="$CONTRIB_ANDROID/fresh_clone/electrum" && \
+        sudo rm -rf "$FRESH_CLONE" && \
+        umask 0022 && \
+        git clone "$PROJECT_ROOT" "$FRESH_CLONE" && \
+        cd "$FRESH_CLONE"
+    git checkout "$ELECBUILD_COMMIT"
+    PROJECT_ROOT_OR_FRESHCLONE_ROOT="$FRESH_CLONE"
+else
+    info "not doing fresh clone."
+fi
+
+DOCKER_RUN_FLAGS=""
+if [[ -n "$1"  && "$1" == "release" ]] ; then
+    info "'release' mode selected. mounting ~/.keystore inside container."
+    DOCKER_RUN_FLAGS="-v $HOME/.keystore:/home/user/.keystore"
+fi
+
+info "building binary..."
+mkdir --parents "$PROJECT_ROOT_OR_FRESHCLONE_ROOT"/.buildozer/.gradle
+sudo docker run -it --rm \
+    --name electrum-android-builder-cont \
+    -v "$PROJECT_ROOT_OR_FRESHCLONE_ROOT":/home/user/wspace/electrum \
+    -v "$PROJECT_ROOT_OR_FRESHCLONE_ROOT"/.buildozer/.gradle:/home/user/.gradle \
+    $DOCKER_RUN_FLAGS \
+    --workdir /home/user/wspace/electrum \
+    electrum-android-builder-img \
+    ./contrib/android/make_apk "$@"
+
+# make sure resulting binary location is independent of fresh_clone
+if [ ! -z "$ELECBUILD_COMMIT" ] ; then
+    mkdir --parents "$DISTDIR/"
+    sudo cp -f "$FRESH_CLONE/dist"/* "$DISTDIR/"
+fi
diff --git a/contrib/android/build_docker_image.sh b/contrib/android/build_docker_image.sh
deleted file mode 100755
index 3eae956c5..000000000
--- a/contrib/android/build_docker_image.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/bash
-
-set -e
-
-CONTRIB_ANDROID="$(dirname "$(readlink -e "$0")")"
-CONTRIB="$CONTRIB_ANDROID"/..
-
-cp "$CONTRIB/deterministic-build/requirements-build-android.txt" "$CONTRIB_ANDROID/requirements-build-android.txt"
-sudo docker build -t electrum-android-builder-img "$CONTRIB_ANDROID"
-rm "$CONTRIB_ANDROID/requirements-build-android.txt"
diff --git a/contrib/build-linux/appimage/README.md b/contrib/build-linux/appimage/README.md
index b4712c000..838777b87 100644
--- a/contrib/build-linux/appimage/README.md
+++ b/contrib/build-linux/appimage/README.md
@@ -6,7 +6,6 @@ AppImage binary for Electrum
 
 This assumes an Ubuntu host, but it should not be too hard to adapt to another
 similar system. The host architecture should be x86_64 (amd64).
-The docker commands should be executed in the project's root folder.
 
 We currently only build a single AppImage, for x86_64 architecture.
 Help to adapt these scripts to build for (some flavor of) ARM would be welcome,
@@ -22,25 +21,17 @@ see [issue #5159](https://github.com/spesmilo/electrum/issues/5159).
     $ sudo apt-get install -y docker-ce
     ```
 
-2. Build image
+2. Build binary
 
     ```
-    $ sudo docker build -t electrum-appimage-builder-img contrib/build-linux/appimage
+    $ ./build.sh
     ```
-
-3. Build binary
-
+    If you want reproducibility, try instead e.g.:
     ```
-    $ sudo docker run -it \
-        --name electrum-appimage-builder-cont \
-        -v $PWD:/opt/electrum \
-        --rm \
-        --workdir /opt/electrum/contrib/build-linux/appimage \
-        electrum-appimage-builder-img \
-        ./make_appimage.sh
+    $ ELECBUILD_COMMIT=HEAD ELECBUILD_NOCACHE=1 ./build.sh
     ```
 
-4. The generated binary is in `./dist`.
+3. The generated binary is in `./dist`.
 
 
 ## FAQ
diff --git a/contrib/build-linux/appimage/build.sh b/contrib/build-linux/appimage/build.sh
new file mode 100755
index 000000000..65b361081
--- /dev/null
+++ b/contrib/build-linux/appimage/build.sh
@@ -0,0 +1,57 @@
+#!/bin/bash
+#
+# env vars:
+# - ELECBUILD_NOCACHE: if set, forces rebuild of docker image
+# - ELECBUILD_COMMIT: if set, do a fresh clone and git checkout
+
+set -e
+
+PROJECT_ROOT="$(dirname "$(readlink -e "$0")")/../../.."
+PROJECT_ROOT_OR_FRESHCLONE_ROOT="$PROJECT_ROOT"
+CONTRIB="$PROJECT_ROOT/contrib"
+CONTRIB_APPIMAGE="$CONTRIB/build-linux/appimage"
+DISTDIR="$PROJECT_ROOT/dist"
+
+. "$CONTRIB"/build_tools_util.sh
+
+
+DOCKER_BUILD_FLAGS=""
+if [ ! -z "$ELECBUILD_NOCACHE" ] ; then
+    info "ELECBUILD_NOCACHE is set. forcing rebuild of docker image."
+    DOCKER_BUILD_FLAGS="--pull --no-cache"
+fi
+
+info "building docker image."
+sudo docker build \
+    $DOCKER_BUILD_FLAGS \
+    -t electrum-appimage-builder-img \
+    "$CONTRIB_APPIMAGE"
+
+# maybe do fresh clone
+if [ ! -z "$ELECBUILD_COMMIT" ] ; then
+    info "ELECBUILD_COMMIT=$ELECBUILD_COMMIT. doing fresh clone and git checkout."
+    FRESH_CLONE="$CONTRIB_APPIMAGE/fresh_clone/electrum" && \
+        sudo rm -rf "$FRESH_CLONE" && \
+        umask 0022 && \
+        git clone "$PROJECT_ROOT" "$FRESH_CLONE" && \
+        cd "$FRESH_CLONE"
+    git checkout "$ELECBUILD_COMMIT"
+    PROJECT_ROOT_OR_FRESHCLONE_ROOT="$FRESH_CLONE"
+else
+    info "not doing fresh clone."
+fi
+
+info "building binary..."
+sudo docker run -it \
+    --name electrum-appimage-builder-cont \
+    -v "$PROJECT_ROOT_OR_FRESHCLONE_ROOT":/opt/electrum \
+    --rm \
+    --workdir /opt/electrum/contrib/build-linux/appimage \
+    electrum-appimage-builder-img \
+    ./make_appimage.sh
+
+# make sure resulting binary location is independent of fresh_clone
+if [ ! -z "$ELECBUILD_COMMIT" ] ; then
+    mkdir --parents "$DISTDIR/"
+    sudo cp -f "$FRESH_CLONE/dist"/* "$DISTDIR/"
+fi
diff --git a/contrib/build-linux/sdist/README.md b/contrib/build-linux/sdist/README.md
index d0b09f8c2..2ff3ed011 100644
--- a/contrib/build-linux/sdist/README.md
+++ b/contrib/build-linux/sdist/README.md
@@ -5,8 +5,7 @@ Source tarballs
    distributables that match the official releases._
 
 This assumes an Ubuntu (x86_64) host, but it should not be too hard to adapt to another
-similar system. The docker commands should be executed in the project's root
-folder.
+similar system.
 
 1. Install Docker
 
@@ -17,34 +16,14 @@ folder.
     $ sudo apt-get install -y docker-ce
     ```
 
-2. Build image
+2. Build source tarball
 
     ```
-    $ sudo docker build -t electrum-sdist-builder-img contrib/build-linux/sdist
+    $ ./build.sh
     ```
-
-3. Build source tarballs
-
-    It's recommended to build from a fresh clone
-    (but you can skip this if reproducibility is not necessary).
-
+    If you want reproducibility, try instead e.g.:
     ```
-    $ FRESH_CLONE="contrib/build-linux/sdist/fresh_clone/electrum" && \
-        sudo rm -rf "$FRESH_CLONE" && \
-        umask 0022 && \
-        git clone . "$FRESH_CLONE" && \
-        cd "$FRESH_CLONE"
+    $ ELECBUILD_COMMIT=HEAD ELECBUILD_NOCACHE=1 ./build.sh
     ```
 
-    And then build from this directory:
-    ```
-    $ git checkout $REV
-    $ sudo docker run -it \
-        --name electrum-sdist-builder-cont \
-        -v $PWD:/opt/electrum \
-        --rm \
-        --workdir /opt/electrum/contrib/build-linux/sdist \
-        electrum-sdist-builder-img \
-        ./make_sdist.sh
-    ```
-4. The generated distributables are in `./dist`.
+3. The generated distributables are in `./dist`.
diff --git a/contrib/build-linux/sdist/build.sh b/contrib/build-linux/sdist/build.sh
new file mode 100755
index 000000000..5f64c160e
--- /dev/null
+++ b/contrib/build-linux/sdist/build.sh
@@ -0,0 +1,57 @@
+#!/bin/bash
+#
+# env vars:
+# - ELECBUILD_NOCACHE: if set, forces rebuild of docker image
+# - ELECBUILD_COMMIT: if set, do a fresh clone and git checkout
+
+set -e
+
+PROJECT_ROOT="$(dirname "$(readlink -e "$0")")/../../.."
+PROJECT_ROOT_OR_FRESHCLONE_ROOT="$PROJECT_ROOT"
+CONTRIB="$PROJECT_ROOT/contrib"
+CONTRIB_SDIST="$CONTRIB/build-linux/sdist"
+DISTDIR="$PROJECT_ROOT/dist"
+
+. "$CONTRIB"/build_tools_util.sh
+
+
+DOCKER_BUILD_FLAGS=""
+if [ ! -z "$ELECBUILD_NOCACHE" ] ; then
+    info "ELECBUILD_NOCACHE is set. forcing rebuild of docker image."
+    DOCKER_BUILD_FLAGS="--pull --no-cache"
+fi
+
+info "building docker image."
+sudo docker build \
+    $DOCKER_BUILD_FLAGS \
+    -t electrum-sdist-builder-img \
+    "$CONTRIB_SDIST"
+
+# maybe do fresh clone
+if [ ! -z "$ELECBUILD_COMMIT" ] ; then
+    info "ELECBUILD_COMMIT=$ELECBUILD_COMMIT. doing fresh clone and git checkout."
+    FRESH_CLONE="$CONTRIB_SDIST/fresh_clone/electrum" && \
+        sudo rm -rf "$FRESH_CLONE" && \
+        umask 0022 && \
+        git clone "$PROJECT_ROOT" "$FRESH_CLONE" && \
+        cd "$FRESH_CLONE"
+    git checkout "$ELECBUILD_COMMIT"
+    PROJECT_ROOT_OR_FRESHCLONE_ROOT="$FRESH_CLONE"
+else
+    info "not doing fresh clone."
+fi
+
+info "building binary..."
+sudo docker run -it \
+    --name electrum-sdist-builder-cont \
+    -v "$PROJECT_ROOT_OR_FRESHCLONE_ROOT":/opt/electrum \
+    --rm \
+    --workdir /opt/electrum/contrib/build-linux/sdist \
+    electrum-sdist-builder-img \
+    ./make_sdist.sh
+
+# make sure resulting binary location is independent of fresh_clone
+if [ ! -z "$ELECBUILD_COMMIT" ] ; then
+    mkdir --parents "$DISTDIR/"
+    sudo cp -f "$FRESH_CLONE/dist"/* "$DISTDIR/"
+fi
diff --git a/contrib/build-wine/README.md b/contrib/build-wine/README.md
index e213a98c8..61fdf205d 100644
--- a/contrib/build-wine/README.md
+++ b/contrib/build-wine/README.md
@@ -5,8 +5,7 @@ Windows binaries
    binaries that match the official releases._
 
 This assumes an Ubuntu (x86_64) host, but it should not be too hard to adapt to another
-similar system. The docker commands should be executed in the project's root
-folder.
+similar system.
 
 1. Install Docker
 
@@ -21,39 +20,17 @@ folder.
     (see [#6971](https://github.com/spesmilo/electrum/issues/6971)).
     If having problems, try to upgrade to at least `docker 20.10`.
 
-2. Build image
+2. Build Windows binaries
 
     ```
-    $ sudo docker build -t electrum-wine-builder-img contrib/build-wine
+    $ ./build.sh
     ```
-
-    Note: see [this](https://stackoverflow.com/a/40516974/7499128) if having dns problems
-
-3. Build Windows binaries
-
-    It's recommended to build from a fresh clone
-    (but you can skip this if reproducibility is not necessary).
-
+    If you want reproducibility, try instead e.g.:
     ```
-    $ FRESH_CLONE="contrib/build-wine/fresh_clone/electrum" && \
-        sudo rm -rf "$FRESH_CLONE" && \
-        umask 0022 && \
-        git clone . "$FRESH_CLONE" && \
-        cd "$FRESH_CLONE"
+    $ ELECBUILD_COMMIT=HEAD ELECBUILD_NOCACHE=1 ./build.sh
     ```
 
-    And then build from this directory:
-    ```
-    $ git checkout $REV
-    $ sudo docker run -it \
-        --name electrum-wine-builder-cont \
-        -v $PWD:/opt/wine64/drive_c/electrum \
-        --rm \
-        --workdir /opt/wine64/drive_c/electrum/contrib/build-wine \
-        electrum-wine-builder-img \
-        ./make_win.sh
-    ```
-4. The generated binaries are in `./contrib/build-wine/dist`.
+3. The generated binaries are in `./contrib/build-wine/dist`.
 
 
 
diff --git a/contrib/build-wine/build.sh b/contrib/build-wine/build.sh
new file mode 100755
index 000000000..ff0c062da
--- /dev/null
+++ b/contrib/build-wine/build.sh
@@ -0,0 +1,56 @@
+#!/bin/bash
+#
+# env vars:
+# - ELECBUILD_NOCACHE: if set, forces rebuild of docker image
+# - ELECBUILD_COMMIT: if set, do a fresh clone and git checkout
+
+set -e
+
+PROJECT_ROOT="$(dirname "$(readlink -e "$0")")/../.."
+PROJECT_ROOT_OR_FRESHCLONE_ROOT="$PROJECT_ROOT"
+CONTRIB="$PROJECT_ROOT/contrib"
+CONTRIB_WINE="$CONTRIB/build-wine"
+
+. "$CONTRIB"/build_tools_util.sh
+
+
+DOCKER_BUILD_FLAGS=""
+if [ ! -z "$ELECBUILD_NOCACHE" ] ; then
+    info "ELECBUILD_NOCACHE is set. forcing rebuild of docker image."
+    DOCKER_BUILD_FLAGS="--pull --no-cache"
+fi
+
+info "building docker image."
+sudo docker build \
+    $DOCKER_BUILD_FLAGS \
+    -t electrum-wine-builder-img \
+    "$CONTRIB_WINE"
+
+# maybe do fresh clone
+if [ ! -z "$ELECBUILD_COMMIT" ] ; then
+    info "ELECBUILD_COMMIT=$ELECBUILD_COMMIT. doing fresh clone and git checkout."
+    FRESH_CLONE="$CONTRIB_WINE/fresh_clone/electrum" && \
+        sudo rm -rf "$FRESH_CLONE" && \
+        umask 0022 && \
+        git clone "$PROJECT_ROOT" "$FRESH_CLONE" && \
+        cd "$FRESH_CLONE"
+    git checkout "$ELECBUILD_COMMIT"
+    PROJECT_ROOT_OR_FRESHCLONE_ROOT="$FRESH_CLONE"
+else
+    info "not doing fresh clone."
+fi
+
+info "building binary..."
+sudo docker run -it \
+    --name electrum-wine-builder-cont \
+    -v "$PROJECT_ROOT_OR_FRESHCLONE_ROOT":/opt/wine64/drive_c/electrum \
+    --rm \
+    --workdir /opt/wine64/drive_c/electrum/contrib/build-wine \
+    electrum-wine-builder-img \
+    ./make_win.sh
+
+# make sure resulting binary location is independent of fresh_clone
+if [ ! -z "$ELECBUILD_COMMIT" ] ; then
+    mkdir --parents "$PROJECT_ROOT/contrib/build-wine/dist/"
+    sudo cp -f "$FRESH_CLONE/contrib/build-wine/dist"/* "$PROJECT_ROOT/contrib/build-wine/dist/"
+fi
diff --git a/contrib/release.sh b/contrib/release.sh
index fa33b491a..f91945562 100755
--- a/contrib/release.sh
+++ b/contrib/release.sh
@@ -24,6 +24,9 @@ REV=`git describe --tags`
 echo "REV: $REV"
 COMMIT=$(git rev-parse HEAD)
 
+export ELECBUILD_COMMIT="${COMMIT}^{commit}"
+#export ELECBUILD_NOCACHE=1
+
 
 git_status=$(git status --porcelain)
 if [ ! -z "$git_status" ]; then
@@ -39,23 +42,7 @@ target=Electrum-$VERSION.tar.gz
 if test -f dist/$target; then
     echo "file exists: $target"
 else
-   pushd .
-   sudo docker build -t electrum-sdist-builder-img contrib/build-linux/sdist
-   FRESH_CLONE="contrib/build-linux/sdist/fresh_clone/electrum" && \
-        sudo rm -rf "$FRESH_CLONE" && \
-        umask 0022 && \
-        git clone . "$FRESH_CLONE" && \
-        cd "$FRESH_CLONE"
-   git checkout "${COMMIT}^{commit}"
-   sudo docker run -it \
-        --name electrum-sdist-builder-cont \
-        -v $PWD:/opt/electrum \
-        --rm \
-        --workdir /opt/electrum/contrib/build-linux/sdist \
-        electrum-sdist-builder-img \
-        ./make_sdist.sh
-   popd
-   cp /opt/electrum/contrib/build-linux/sdist/fresh_clone/electrum/dist/$target dist/
+   ./contrib/build-linux/sdist/build.sh
 fi
 
 # appimage
@@ -68,14 +55,7 @@ fi
 if test -f dist/$target; then
     echo "file exists: $target"
 else
-    sudo docker build -t electrum-appimage-builder-img contrib/build-linux/appimage
-    sudo docker run -it \
-        --name electrum-appimage-builder-cont \
-        -v $PWD:/opt/electrum \
-        --rm \
-        --workdir /opt/electrum/contrib/build-linux/appimage \
-        electrum-appimage-builder-img \
-        ./make_appimage.sh
+    ./contrib/build-linux/appimage/build.sh
 fi
 
 
@@ -85,20 +65,7 @@ if test -f dist/$target; then
     echo "file exists: $target"
 else
     pushd .
-    FRESH_CLONE="contrib/build-wine/fresh_clone/electrum" && \
-        sudo rm -rf "$FRESH_CLONE" && \
-        umask 0022 && \
-        git clone . "$FRESH_CLONE" && \
-        cd "$FRESH_CLONE"
-    git checkout "${COMMIT}^{commit}"
-    sudo docker run -it \
-        --name electrum-wine-builder-cont \
-        -v $PWD:/opt/wine64/drive_c/electrum \
-        --rm \
-        --workdir /opt/wine64/drive_c/electrum/contrib/build-wine \
-        electrum-wine-builder-img \
-        ./make_win.sh
-    # do this in the fresh clone directory!
+    ./contrib/build-wine/build.sh
     cd contrib/build-wine/
     ./sign.sh
     cp ./signed/*.exe /opt/electrum/dist/
@@ -112,28 +79,7 @@ target2=Electrum-$VERSION.0-arm64-v8a-release.apk
 if test -f dist/$target1; then
     echo "file exists: $target1"
 else
-    pushd .
-    ./contrib/android/build_docker_image.sh
-    FRESH_CLONE="contrib/android/fresh_clone/electrum" && \
-        sudo rm -rf "$FRESH_CLONE" && \
-        umask 0022 && \
-        git clone . "$FRESH_CLONE" && \
-        cd "$FRESH_CLONE"
-    git checkout "${COMMIT}^{commit}"
-    mkdir --parents $PWD/.buildozer/.gradle
-    sudo docker run -it --rm \
-         --name electrum-android-builder-cont \
-         -v $PWD:/home/user/wspace/electrum \
-         -v $PWD/.buildozer/.gradle:/home/user/.gradle \
-         -v ~/.keystore:/home/user/.keystore \
-         --workdir /home/user/wspace/electrum \
-         electrum-android-builder-img \
-         ./contrib/android/make_apk release
-    popd
-
-    cp contrib/android/fresh_clone/electrum/dist/$target1 dist/
-    cp contrib/android/fresh_clone/electrum/dist/$target2 dist/
-
+    ./contrib/android/build.sh release
 fi
 
 
@@ -153,7 +99,7 @@ fi
 echo "build complete"
 sha256sum dist/*.tar.gz
 sha256sum dist/*.AppImage
-sha256sum contrib/build-wine/fresh_clone/electrum/contrib/build-wine/dist/*.exe
+sha256sum contrib/build-wine/dist/*.exe
 
 echo -n "proceed (y/n)? "
 read answer