Fix permissions for real this time

build/Dockerfile

@@ -4,23 +4,14 @@ FROM archlinux:latest
 RUN pacman -Syu --noconfirm && \
     pacman -S --noconfirm base-devel git sudo wget jq gnupg
 
-# Create build user (required for makepkg)
-# Note: UID/GID can be overridden at runtime via --build-arg
-ARG BUILD_UID=1000
-ARG BUILD_GID=1000
+# Create build user (required for makepkg - cannot run as root)
+RUN useradd -m -G wheel builder && \
+    echo "builder ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
 
-# Only create builder user if not using root (UID 0)
-RUN if [ ${BUILD_UID} -ne 0 ]; then \
-      groupadd -g ${BUILD_GID} builder && \
-      useradd -m -u ${BUILD_UID} -g ${BUILD_GID} -G wheel builder && \
-      echo "builder ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers; \
-    fi
-
-# Switch to builder user if not root, otherwise stay as root
-USER ${BUILD_UID}
+USER builder
 WORKDIR /src
 
-# Setup GPG directory for whichever user we're using
+# Setup GPG directory
 RUN mkdir -p ~/.gnupg && chmod 700 ~/.gnupg
 
 # Default command