diff --git a/meson.build b/meson.build
index 8ec6f8a..8291ce0 100644
--- a/meson.build
+++ b/meson.build
@@ -72,9 +72,13 @@ debug_build = get_option('buildtype').startswith('debug')
 host_cpu_family = host_machine.cpu_family()
 
 if host_cpu_family == 'x86'
-  host_x86_bits = 32
+  host_bits = 32
 elif host_cpu_family == 'x86_64'
-  host_x86_bits = 64
+  host_bits = 64
+elif host_cpu_family == 'arm'
+  host_bits = 32
+elif host_cpu_family == 'aarch64'
+  host_bits = 64
 endif
 
 
@@ -87,19 +91,20 @@ if host_system == 'windows' or host_system == 'cygwin'
     nasm_flags += '-DPREFIX'
   endif
 
-  nasm_flags += ['-f', 'win@0@'.format(host_x86_bits)]
+  nasm_flags += ['-f', 'win@0@'.format(host_bits)]
 elif host_system == 'linux' or host_system == 'bsd' # The BSDs are close enough, right?
   if debug_build
     nasm_flags += '-gdwarf'
   endif
 
-  nasm_flags += ['-f', 'elf@0@'.format(host_x86_bits)]
+  nasm_flags += ['-f', 'elf@0@'.format(host_bits)]
 elif host_system == 'darwin'
   if debug_build
     nasm_flags += '-gdwarf'
   endif
 
-  nasm_flags += ['-DPREFIX', '-f', 'macho@0@'.format(host_x86_bits)]
+  nasm_flags += ['-DPREFIX', '-f', 'macho@0@'.format(host_bits)]
+  cflags += ['-DPREFIX']
 else
   error('Unknown host system "@0@".'.format(host_system))
 endif
@@ -160,6 +165,18 @@ if host_cpu_family.startswith('x86')
                                 install: false)
 endif
 
+if host_cpu_family.startswith('arm') or host_cpu_family.startswith('aarch64')
+  cflags += ['-DMVTOOLS_ARM=1']
+
+  if host_cpu_family.startswith('aarch64')
+    asm_sources = [
+      'src/asm/aarch64-pixel-a.S',
+    ]
+
+    sources += asm_sources
+  endif 
+endif
+
 
 cxx = meson.get_compiler('cpp')
 
diff --git a/readme.rst b/readme.rst
index a934b25..7e2d683 100644
--- a/readme.rst
+++ b/readme.rst
@@ -143,9 +143,8 @@ FFTW3 configured for 32 bit floats is required ("fftw3f").
 
 ::
 
-   mkdir build; cd build
-   meson ../
-   ninja
+   meson setup build
+   ninja -C build
 
 Or