Also add new pacman dependencies to build container build

Author: sharkwouter

Dockerfile

@@ -6,7 +6,7 @@ ENV PATH $PATH:${PSPDEV}/bin
 
 COPY . /src
 
-RUN apk add build-base bash git autoconf automake python3 py3-pip cmake pkgconfig libarchive-dev openssl-dev gpgme-dev libtool curl-dev
+RUN apk add build-base bash git autoconf automake cmake pkgconfig libarchive-dev openssl-dev gpgme-dev libtool curl-dev meson ninja-build pacman
 RUN cd /src && ./build-all.sh
 
 # Second stage of Dockerfile