diff --git a/make/projects.mk b/make/projects.mk
index 8caa720a..1c3e2cc8 100644
--- a/make/projects.mk
+++ b/make/projects.mk
@@ -14,7 +14,7 @@ endif
 MOD_SCRIPT_DIR        ?= $(firstword $(wildcard $(MODDIR)/scripts $(MODDIR)/bin))
 
 # -- Query the build system about other projects:
-PYTHON                ?= /usr/bin/python
+PYTHON                ?= /usr/bin/python2
 proj_query_cmd         = $(PYTHON) $(MOD_SCRIPT_DIR)/projects.py -p $(PROJECTS_DIR) -t $(TOPDIR) $(PROJECTS_PY_EXTRA_ARGS)
 proj_query             = $(shell $(proj_query_cmd) $(1))
 proj_dir               = $(call proj_query,proj-dir $(1))
diff --git a/make/py-defs.mk b/make/py-defs.mk
index bad75455..894a919d 100644
--- a/make/py-defs.mk
+++ b/make/py-defs.mk
@@ -1,11 +1,11 @@
 ENV_PYTHONPATH       := $(PYTHONPATH)
-PYTHON               ?= python
+PYTHON               ?= python2
 #PYTHON                = python3
 
 ifneq ($(DEVELOPMENT),true)
   PY_SITE_PACKAGES_PATH = $(shell $(PYTHON) -c "import site; print site.getsitepackages()[0]")
 else
-  PY_SITE_PACKAGES_PATH = $(PREFIX)/python/site-packages
+  PY_SITE_PACKAGES_PATH = $(PREFIX)/python2/site-packages
 endif
 
 PY_PREREQ_BUILD      ?= $(shell $(proj_query_cmd) pkg-requires --subsections jw -d ' ' -p --no-version build $(PROJECT))
diff --git a/make/py-mod.mk b/make/py-mod.mk
index a31eeb94..7d0054a8 100644
--- a/make/py-mod.mk
+++ b/make/py-mod.mk
@@ -28,7 +28,7 @@ install-reg.done: install-dirs.done $(PY_INSTALLED_REG)
 	touch $@
 
 %.pyc: %.py
-	python -c "import py_compile; py_compile.compile(\"$<\")"
+	python2 -c "import py_compile; py_compile.compile(\"$<\")"
 
 $(PY_INSTALL_DIR)/%.py: %.py
 	$(INSTALL) -p -m $(PYMODMODE) -o $(PYMODOWNER) -g $(PYMODGROUP) $< $@
diff --git a/make/py-run.mk b/make/py-run.mk
index 853f5272..c7d1b3c9 100644
--- a/make/py-run.mk
+++ b/make/py-run.mk
@@ -12,5 +12,5 @@ clean:
 distclean:
 
 run:
-	/usr/bin/python $(EXE) $(EXE_ARGS)
+	/usr/bin/python2 $(EXE) $(EXE_ARGS)
 
diff --git a/make/python-cli.mk b/make/python-cli.mk
index bdf7d2ba..ac19ed18 100644
--- a/make/python-cli.mk
+++ b/make/python-cli.mk
@@ -9,7 +9,7 @@ clean:
 distclean:
 
 run:
-	python -m $(shell echo $(patsubst %.py,%,$(EXE)) | sed 's%^\./%%; s%/%.%g') $(EXE_ARGS)
+	python2 -m $(shell echo $(patsubst %.py,%,$(EXE)) | sed 's%^\./%%; s%/%.%g') $(EXE_ARGS)
 
 pyc.clean:
 	find . -name '*.pyc' -print0 | xargs -r -0 $(RM) -f
diff --git a/make/scripts-targets.mk b/make/scripts-targets.mk
index e078726d..dd618988 100644
--- a/make/scripts-targets.mk
+++ b/make/scripts-targets.mk
@@ -11,7 +11,7 @@ endif
 HOME_BIN_EXE_SH = $(addprefix $(HOME)/bin/, $(notdir $(EXE_SH)))
 
 $(HOME)/bin/%.py: %.py
-	echo -e "#!/bin/bash\nexec /usr/bin/python $(shell $(PWD))/$<" '"$$@"' > $@.tmp
+	echo -e "#!/bin/bash\nexec /usr/bin/python2 $(shell $(PWD))/$<" '"$$@"' > $@.tmp
 	chmod 755 $@.tmp
 	mv $@.tmp $@
 
diff --git a/make/swig.mk b/make/swig.mk
index cfef22a2..310d1023 100644
--- a/make/swig.mk
+++ b/make/swig.mk
@@ -45,7 +45,7 @@ else ifeq ($(SWIG_TARGET),android)
 
 else ifeq ($(SWIG_TARGET),python)
 
-  PYTHON_VERSION             ?= $(basename $(lastword $(shell python --version 2>&1)))
+  PYTHON_VERSION             ?= $(basename $(lastword $(shell python2 --version 2>&1)))
   PYTHON_MAJOR_VERSION       ?= $(basename $(PYTHON_VERSION))
   PYTHON_MINOR_VERSION       ?= $(patsubst .%,%,$(suffix $(PYTHON_VERSION)))
 
@@ -60,15 +60,15 @@ else ifeq ($(SWIG_TARGET),python)
   SWIG_GENERATED_EXTRA       += $(SWIG_PY_MODULE_PYC)
   SWIG_INSTALLED_EXTRA       += $(SWIG_MODULE_TARGET_DIR)/$(SWIG_PY_MODULE_PYC)
 
-  INCLUDE                    += $(shell pkg-config --cflags python)
-  BUILD_LDFLAGS              += $(shell pkg-config --libs python) $(shell php-config --ldflags --libs)
+  INCLUDE                    += $(shell pkg-config --cflags python2)
+  BUILD_LDFLAGS              += $(shell pkg-config --libs python2) $(shell php-config --ldflags --libs)
 
   INSTALL_LIBDIR              = $(SWIG_MODULE_TARGET_DIR)
 
 all:
 
 %.pyc: %.py
-	python -m py_compile $<
+	python2 -m py_compile $<
 
 else
 
diff --git a/make/topdir.mk b/make/topdir.mk
index 2cad212d..4f0f2abd 100644
--- a/make/topdir.mk
+++ b/make/topdir.mk
@@ -131,7 +131,7 @@ git-update-project-description:
 	ssh git.jannet.de "/opt/jw-build/bin/git-srv-admin.sh $(OPT_JANWARE_PROJECT) update-descriptions $(RPM_PROJECT)"
 
 projects-%:
-	python $(MOD_SCRIPT_DIR)/build.py $* $(RPM_PROJECT)
+	python2 $(MOD_SCRIPT_DIR)/build.py $* $(RPM_PROJECT)
 
 install-deps-devel:
 	sudo zypper in $(shell echo $(RPM_REQUIRES_DEVEL) | sed "s/ *= */-/g; s/ [^ ]\+-__NEXT_VERSION__//")
@@ -156,7 +156,7 @@ prefix.done:
 	touch $@
 
 echo-prereq-build:
-	@python $(MOD_SCRIPT_DIR)/projects.py --topdir . $(PROJECTS_PY_EXTRA_ARGS) requires-pkg $(RPM_PROJECT)
+	@python2 $(MOD_SCRIPT_DIR)/projects.py --topdir . $(PROJECTS_PY_EXTRA_ARGS) requires-pkg $(RPM_PROJECT)
 
 list-files echo-files:
 	@$(LIST_VCS_FILES) -f
diff --git a/scripts/build.py b/scripts/build.py
index 3e1f5d01..60dda4ba 100644
--- a/scripts/build.py
+++ b/scripts/build.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python -u
+#!/usr/bin/python2 -u
 # -*- coding: iso-8859-15 -*-
 
 from __future__ import print_function
@@ -188,7 +188,7 @@ exclude=args.exclude.split()
 proj_base=args.base
 target=args.target
 
-projects_py="/usr/bin/python " + my_dir + "/projects.py --prefix " + proj_base + " " + os.getenv('PROJECTS_PY_EXTRA_ARGS', "")
+projects_py="/usr/bin/python2 " + my_dir + "/projects.py --prefix " + proj_base + " " + os.getenv('PROJECTS_PY_EXTRA_ARGS', "")
 
 env_exclude=os.getenv('BUILD_EXCLUDE', '')
 if len(env_exclude):
diff --git a/scripts/pkg-manager.sh b/scripts/pkg-manager.sh
index d42e089e..9f138124 100644
--- a/scripts/pkg-manager.sh
+++ b/scripts/pkg-manager.sh
@@ -60,6 +60,13 @@ cmd_install()
 		}
 		eval run sudo $env -S apt-get $global_opts install "$@"
 		;;
+	arch)
+		[ "$non_interactive" = 1 ] && {
+			global_opts="$global_opts --noconfirm"
+			env="$env DEBIAN_FRONTEND=noninteractive"
+		}
+		eval run sudo $env -S pacman $global_opts -S "$@"
+		;;
 	*)
 		fatal "Tried to install on unsupported platform \"$ID\""
 		;;
diff --git a/scripts/projects.py b/scripts/projects.py
index c808f7f1..121eb943 100644
--- a/scripts/projects.py
+++ b/scripts/projects.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python -u
+#!/usr/bin/python2 -u
 
 from __future__ import print_function
 import sys