diff --git a/docker-build/Dockerfile.linux-x86_64 b/docker-build/Dockerfile.linux-x86_64
index 85d7dd5..a10a2ee 100644
--- a/docker-build/Dockerfile.linux-x86_64
+++ b/docker-build/Dockerfile.linux-x86_64
@@ -5,6 +5,8 @@ ENV DEBIAN_FRONTEND=noninteractive TZ=UTC
 RUN apt-get update && apt-get install -y --no-install-recommends \
     build-essential libtool autotools-dev automake autoconf pkg-config \
     bsdmainutils python3 curl ca-certificates git unzip zip file rsync \
+    libqt5gui5 libqt5core5a libqt5dbus5 qttools5-dev qttools5-dev-tools qtbase5-dev \
+    libqrencode-dev libzmq3-dev libminiupnpc-dev \
  && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /src
diff --git a/docker-build/build-linux-aarch64.sh b/docker-build/build-linux-aarch64.sh
index 39c51dd..8534d34 100755
--- a/docker-build/build-linux-aarch64.sh
+++ b/docker-build/build-linux-aarch64.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+export LC_ALL=C
 set -euo pipefail
 
 IMAGE_NAME="palladium-builder:linux-aarch64-ubuntu20.04"
@@ -28,6 +29,12 @@ docker run --rm --platform=linux/amd64 \
     set -euo pipefail
     cd /src
 
+    echo '[*] cleaning tree (avoid host-built artifacts)...'
+    [[ -f Makefile ]] && make distclean || true
+    rm -rf univalue/.libs
+    rm -rf depends/${HOST_TRIPLE}
+    rm -f config.cache
+
     echo '[*] depends (HOST=${HOST_TRIPLE})...'
     cd depends && make HOST=${HOST_TRIPLE} -j\$(nproc) && cd ..
 
@@ -35,7 +42,11 @@ docker run --rm --platform=linux/amd64 \
     [[ -x ./autogen.sh ]] && ./autogen.sh
     [[ -f ./configure ]] || { echo 'configure not found: autogen failed'; exit 1; }
 
+    # Ensure we use Qt tools (moc/uic/rcc) from depends, not system Qt
+    export PATH=\$PWD/depends/${HOST_TRIPLE}/bin:\$PATH
+
     ./configure --prefix=\$PWD/depends/${HOST_TRIPLE} \
+                --with-qt-bindir=\$PWD/depends/${HOST_TRIPLE}/bin \
                 --host=${HOST_TRIPLE} \
                 --enable-glibc-back-compat \
                 --enable-reduce-exports \
diff --git a/docker-build/build-linux-armv7l.sh b/docker-build/build-linux-armv7l.sh
index ebc2e76..3927a66 100755
--- a/docker-build/build-linux-armv7l.sh
+++ b/docker-build/build-linux-armv7l.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+export LC_ALL=C
 set -euo pipefail
 
 IMAGE_NAME="palladium-builder:linux-armv7l-ubuntu20.04"
@@ -27,6 +28,12 @@ docker run --rm --platform=linux/amd64 \
     set -euo pipefail
     cd /src
 
+    echo '[*] cleaning tree (avoid host-built artifacts)...'
+    [[ -f Makefile ]] && make distclean || true
+    rm -rf univalue/.libs
+    rm -rf depends/${HOST_TRIPLE}
+    rm -f config.cache
+
     echo '[*] depends (HOST=${HOST_TRIPLE})...'
     cd depends && make HOST=${HOST_TRIPLE} -j\$(nproc) && cd ..
 
@@ -34,7 +41,11 @@ docker run --rm --platform=linux/amd64 \
     [[ -x ./autogen.sh ]] && ./autogen.sh
     [[ -f ./configure ]] || { echo 'configure not found: autogen failed'; exit 1; }
 
+    # Ensure we use Qt tools (moc/uic/rcc) from depends, not system Qt
+    export PATH=\$PWD/depends/${HOST_TRIPLE}/bin:\$PATH
+
     ./configure --prefix=\$PWD/depends/${HOST_TRIPLE} \
+                --with-qt-bindir=\$PWD/depends/${HOST_TRIPLE}/bin \
                 --host=${HOST_TRIPLE} \
                 --enable-glibc-back-compat \
                 --enable-reduce-exports \
diff --git a/docker-build/build-linux-x86_64.sh b/docker-build/build-linux-x86_64.sh
index 598e255..bb29b47 100755
--- a/docker-build/build-linux-x86_64.sh
+++ b/docker-build/build-linux-x86_64.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+export LC_ALL=C
 set -euo pipefail
 
 IMAGE_NAME="palladium-builder:linux-x86_64-ubuntu20.04"
@@ -28,6 +29,12 @@ docker run --rm --platform=linux/amd64 \
     set -euo pipefail
     cd /src
 
+    echo '[*] cleaning tree (avoid host-built artifacts)...'
+    [[ -f Makefile ]] && make distclean || true
+    rm -rf univalue/.libs
+    rm -rf depends/${HOST_TRIPLE}
+    rm -f config.cache
+
     echo '[*] depends...'
     cd depends && make HOST=${HOST_TRIPLE} -j\$(nproc) && cd ..
 
@@ -35,7 +42,11 @@ docker run --rm --platform=linux/amd64 \
     [[ -x ./autogen.sh ]] && ./autogen.sh
     [[ -f ./configure ]] || { echo 'configure not found: autogen failed'; exit 1; }
 
+    # Ensure we use Qt tools (moc/uic/rcc) from depends, not system Qt
+    export PATH=\$PWD/depends/${HOST_TRIPLE}/bin:\$PATH
+
     ./configure --prefix=\$PWD/depends/${HOST_TRIPLE} \
+                --with-qt-bindir=\$PWD/depends/${HOST_TRIPLE}/bin \
                 --enable-glibc-back-compat \
                 --enable-reduce-exports \
                 LDFLAGS='-static-libstdc++'
@@ -55,4 +66,4 @@ docker run --rm --platform=linux/amd64 \
     echo '[*] build COMPLETED (everything in container) → /out'
   "
 
-echo "[*] Binaries available in: ${OUT_DIR}"
\ No newline at end of file
+echo "[*] Binaries available in: ${OUT_DIR}"
diff --git a/docker-build/build-menu.sh b/docker-build/build-menu.sh
index 0456f0b..53c2d4d 100755
--- a/docker-build/build-menu.sh
+++ b/docker-build/build-menu.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+export LC_ALL=C
 set -euo pipefail
 
 # Directory where this script is located
diff --git a/docker-build/build-windows.sh b/docker-build/build-windows.sh
index 284a372..d9c8293 100755
--- a/docker-build/build-windows.sh
+++ b/docker-build/build-windows.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+export LC_ALL=C
 set -euo pipefail
 
 # Default to not building the installer
@@ -38,6 +39,14 @@ docker run --rm --platform=linux/amd64 \
     set -euo pipefail
     cd /src
 
+    echo '[*] cleaning tree (avoid host-built artifacts)...'
+    [[ -f Makefile ]] && make distclean || true
+    (cd univalue && make distclean) || true
+    rm -rf univalue/.libs univalue/lib/.libs
+    rm -f univalue/config.cache univalue/config.status
+    rm -rf depends/${HOST_TRIPLE}
+    rm -f config.cache
+
     echo '[*] depends (Windows cross, HOST=${HOST_TRIPLE})...'
     cd depends && make HOST=${HOST_TRIPLE} -j\$(nproc) && cd ..
 
@@ -77,4 +86,4 @@ docker run --rm --platform=linux/amd64 \
     echo '[*] build COMPLETED (everything in container) → /out'
   "
 
-echo "[*] Windows executables available in: ${OUT_DIR}"
\ No newline at end of file
+echo "[*] Windows executables available in: ${OUT_DIR}"
diff --git a/quick-build.sh b/quick-build.sh
index ff9acc3..ea191c0 100755
--- a/quick-build.sh
+++ b/quick-build.sh
@@ -1,4 +1,5 @@
-#!/bin/bash
+#!/usr/bin/env bash
+export LC_ALL=C
 
 ###############################################################################
 # Quick Build Script for Palladium Core
diff --git a/update_version.sh b/update_version.sh
index 22faf6d..66f72eb 100755
--- a/update_version.sh
+++ b/update_version.sh
@@ -1,4 +1,5 @@
-#!/bin/bash
+#!/usr/bin/env bash
+export LC_ALL=C
 set -e
 
 echo "========================================================"