diff --git a/.travis.yml b/.travis.yml
index d2a15ca..4aa13e0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,37 +4,35 @@ python: nightly
 dist: xenial
 os: linux
 
-addons:
-  apt:
-    packages:
-      - astyle
-      - libalut-dev
-      - libconfig-dev
-      - libnotify-dev
-      - libopenal-dev
-      - libopus-dev
-      - libqrencode-dev
-      - libvpx-dev
+jobs:
+  include:
+    - env: JOB=linux
 
-cache:
-  directories:
-    - $HOME/cache
+      addons:
+        apt:
+          packages:
+            - libalut-dev
+            - libconfig-dev
+            - libnotify-dev
+            - libopenal-dev
+            - libopus-dev
+            - libqrencode-dev
+            - libvpx-dev
 
-install:
-  # Where to find libraries.
-  - export LD_LIBRARY_PATH=$HOME/cache/usr/lib
-  - export PKG_CONFIG_PATH=$HOME/cache/usr/lib/pkgconfig
-  # c-sodium
-  - git clone --depth=1 --branch=stable https://github.com/jedisct1/libsodium ../libsodium
-  - test -f $HOME/cache/usr/lib/libsodium.so || (cd ../libsodium && ./configure --prefix=$HOME/cache/usr && make install -j$(nproc))
-  # c-toxcore
-  - git clone --depth=1 https://github.com/TokTok/c-toxcore ../c-toxcore
-  - test -f $HOME/cache/usr/lib/libtoxcore.so || (cd ../c-toxcore && cmake -B_build -H. -DCMAKE_INSTALL_PREFIX:PATH=$HOME/cache/usr && make -C_build install -j$(nproc))
-  # astyle
-  - wget -O ../astyle.tar.gz https://deb.debian.org/debian/pool/main/a/astyle/astyle_2.06.orig.tar.gz
-  - test -f $HOME/cache/astyle/build/gcc/bin/astyle || (tar -xf ../astyle.tar.gz -C "$HOME/cache" && make -C "$HOME/cache/astyle/build/gcc" -j2)
+      cache:
+        directories:
+          - $HOME/cache
 
-script:
-  - $HOME/cache/astyle/build/gcc/bin/astyle --options=astylerc $(find . -name "*.[ch]")
-  - git diff --exit-code
-  - make ENABLE_PYTHON=1 -j2
+      install:
+        # Where to find libraries.
+        - export LD_LIBRARY_PATH=$HOME/cache/usr/lib
+        - export PKG_CONFIG_PATH=$HOME/cache/usr/lib/pkgconfig
+        # c-sodium
+        - git clone --depth=1 --branch=stable https://github.com/jedisct1/libsodium ../libsodium
+        - test -f $HOME/cache/usr/lib/libsodium.so || (cd ../libsodium && ./configure --prefix=$HOME/cache/usr && make install -j$(nproc))
+        # c-toxcore
+        - git clone --depth=1 https://github.com/TokTok/c-toxcore ../c-toxcore
+        - test -f $HOME/cache/usr/lib/libtoxcore.so || (cd ../c-toxcore && cmake -B_build -H. -DCMAKE_INSTALL_PREFIX:PATH=$HOME/cache/usr && make -C_build install -j$(nproc))
+
+      script:
+        - make ENABLE_PYTHON=1 -j$(nproc)
diff --git a/cfg/checks/audio.mk b/cfg/checks/audio.mk
index 7e684f7..304fd5f 100644
--- a/cfg/checks/audio.mk
+++ b/cfg/checks/audio.mk
@@ -8,13 +8,13 @@ else
 endif
 
 # Check if we can build audio support
-CHECK_AUDIO_LIBS = $(shell $(PKG_CONFIG) --exists $(AUDIO_LIBS) || echo -n "error")
+CHECK_AUDIO_LIBS := $(shell $(PKG_CONFIG) --exists $(AUDIO_LIBS) || echo -n "error")
 ifneq ($(CHECK_AUDIO_LIBS), error)
     LIBS += $(AUDIO_LIBS)
     CFLAGS += $(AUDIO_CFLAGS)
     OBJ += $(AUDIO_OBJ)
 else ifneq ($(MAKECMDGOALS), clean)
-    MISSING_AUDIO_LIBS = $(shell for lib in $(AUDIO_LIBS) ; do if ! $(PKG_CONFIG) --exists $$lib ; then echo $$lib ; fi ; done)
+    MISSING_AUDIO_LIBS := $(shell for lib in $(AUDIO_LIBS) ; do if ! $(PKG_CONFIG) --exists $$lib ; then echo $$lib ; fi ; done)
     $(warning WARNING -- Toxic will be compiled without audio support)
     $(warning WARNING -- You need these libraries for audio support)
     $(warning WARNING -- $(MISSING_AUDIO_LIBS))
diff --git a/cfg/checks/check_features.mk b/cfg/checks/check_features.mk
index 4a3436f..2d4d923 100644
--- a/cfg/checks/check_features.mk
+++ b/cfg/checks/check_features.mk
@@ -1,19 +1,19 @@
 CHECKS_DIR = $(CFG_DIR)/checks
 
 # Check if we want build X11 support
-X11 = $(shell if [ -z "$(DISABLE_X11)" ] || [ "$(DISABLE_X11)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
+X11 := $(shell if [ -z "$(DISABLE_X11)" ] || [ "$(DISABLE_X11)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
 ifneq ($(X11), disabled)
     -include $(CHECKS_DIR)/x11.mk
 endif
 
 # Check if we want build audio support
-AUDIO = $(shell if [ -z "$(DISABLE_AV)" ] || [ "$(DISABLE_AV)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
+AUDIO := $(shell if [ -z "$(DISABLE_AV)" ] || [ "$(DISABLE_AV)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
 ifneq ($(AUDIO), disabled)
     -include $(CHECKS_DIR)/audio.mk
 endif
 
 # Check if we want build video support
-VIDEO = $(shell if [ -z "$(DISABLE_VI)" ] || [ "$(DISABLE_VI)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
+VIDEO := $(shell if [ -z "$(DISABLE_VI)" ] || [ "$(DISABLE_VI)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
 ifneq ($(X11), disabled)
 ifneq ($(AUDIO), disabled)
 ifneq ($(VIDEO), disabled)
@@ -23,42 +23,42 @@ endif
 endif
 
 # Check if we want build sound notifications support
-SND_NOTIFY = $(shell if [ -z "$(DISABLE_SOUND_NOTIFY)" ] || [ "$(DISABLE_SOUND_NOTIFY)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
+SND_NOTIFY := $(shell if [ -z "$(DISABLE_SOUND_NOTIFY)" ] || [ "$(DISABLE_SOUND_NOTIFY)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
 ifneq ($(SND_NOTIFY), disabled)
     -include $(CHECKS_DIR)/sound_notifications.mk
 endif
 
 # Check if we want build desktop notifications support
-DESK_NOTIFY = $(shell if [ -z "$(DISABLE_DESKTOP_NOTIFY)" ] || [ "$(DISABLE_DESKTOP_NOTIFY)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
+DESK_NOTIFY := $(shell if [ -z "$(DISABLE_DESKTOP_NOTIFY)" ] || [ "$(DISABLE_DESKTOP_NOTIFY)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
 ifneq ($(DESK_NOTIFY), disabled)
     -include $(CHECKS_DIR)/desktop_notifications.mk
 endif
 
 # Check if we want build QR export support
-QR_CODE = $(shell if [ -z "$(DISABLE_QRCODE)" ] || [ "$(DISABLE_QRCODE)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
+QR_CODE := $(shell if [ -z "$(DISABLE_QRCODE)" ] || [ "$(DISABLE_QRCODE)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
 ifneq ($(QR_CODE), disabled)
     -include $(CHECKS_DIR)/qr.mk
 endif
 
 # Check if we want build QR exported as PNG support
-QR_PNG = $(shell if [ -z "$(DISABLE_QRPNG)" ] || [ "$(DISABLE_QRPNG)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
+QR_PNG := $(shell if [ -z "$(DISABLE_QRPNG)" ] || [ "$(DISABLE_QRPNG)" = "0" ] ; then echo enabled ; else echo disabled ; fi)
 ifneq ($(QR_PNG), disabled)
     -include $(CHECKS_DIR)/qr_png.mk
 endif
 
 # Check if we want build Python scripting support
-PYTHON = $(shell if [ -z "$(ENABLE_PYTHON)" ] || [ "$(ENABLE_PYTHON)" = "0" ] ; then echo disabled ; else echo enabled ; fi)
+PYTHON := $(shell if [ -z "$(ENABLE_PYTHON)" ] || [ "$(ENABLE_PYTHON)" = "0" ] ; then echo disabled ; else echo enabled ; fi)
 ifneq ($(PYTHON), disabled)
     -include $(CHECKS_DIR)/python.mk
 endif
 
 # Check if we can build Toxic
-CHECK_LIBS = $(shell $(PKG_CONFIG) --exists $(LIBS) || echo -n "error")
+CHECK_LIBS := $(shell $(PKG_CONFIG) --exists $(LIBS) || echo -n "error")
 ifneq ($(CHECK_LIBS), error)
     CFLAGS += $(shell $(PKG_CONFIG) --cflags $(LIBS))
     LDFLAGS += $(shell $(PKG_CONFIG) --libs $(LIBS))
 else ifneq ($(MAKECMDGOALS), clean)
-    MISSING_LIBS = $(shell for lib in $(LIBS) ; do if ! $(PKG_CONFIG) --exists $$lib ; then echo $$lib ; fi ; done)
+    MISSING_LIBS := $(shell for lib in $(LIBS) ; do if ! $(PKG_CONFIG) --exists $$lib ; then echo $$lib ; fi ; done)
     $(warning ERROR -- Cannot compile Toxic)
     $(warning ERROR -- You need these libraries)
     $(warning ERROR -- $(MISSING_LIBS))
diff --git a/cfg/checks/desktop_notifications.mk b/cfg/checks/desktop_notifications.mk
index edcdc4f..1f9a8fa 100644
--- a/cfg/checks/desktop_notifications.mk
+++ b/cfg/checks/desktop_notifications.mk
@@ -3,12 +3,12 @@ DESK_NOTIFY_LIBS = libnotify
 DESK_NOTIFY_CFLAGS = -DBOX_NOTIFY
 
 # Check if we can build desktop notifications support
-CHECK_DESK_NOTIFY_LIBS = $(shell $(PKG_CONFIG) --exists $(DESK_NOTIFY_LIBS) || echo -n "error")
+CHECK_DESK_NOTIFY_LIBS := $(shell $(PKG_CONFIG) --exists $(DESK_NOTIFY_LIBS) || echo -n "error")
 ifneq ($(CHECK_DESK_NOTIFY_LIBS), error)
     LIBS += $(DESK_NOTIFY_LIBS)
     CFLAGS += $(DESK_NOTIFY_CFLAGS)
 else ifneq ($(MAKECMDGOALS), clean)
-    MISSING_DESK_NOTIFY_LIBS = $(shell for lib in $(DESK_NOTIFY_LIBS) ; do if ! $(PKG_CONFIG) --exists $$lib ; then echo $$lib ; fi ; done)
+    MISSING_DESK_NOTIFY_LIBS := $(shell for lib in $(DESK_NOTIFY_LIBS) ; do if ! $(PKG_CONFIG) --exists $$lib ; then echo $$lib ; fi ; done)
     $(warning WARNING -- Toxic will be compiled without desktop notifications support)
     $(warning WARNING -- You need these libraries for desktop notifications support)
     $(warning WARNING -- $(MISSING_DESK_NOTIFY_LIBS))