diff --git a/meson.build b/meson.build
index 8c45872..cd786d7 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,10 @@
 project('clevis', 'c', license: 'GPL3+',
   version: '23',
-  default_options: 'c_std=c99'
+  default_options: [ 
+    'c_std=c99',
+    'warning_level=2',
+    'werror=true'
+  ]
 )
 
 libexecdir = join_paths(get_option('prefix'), get_option('libexecdir'))
@@ -15,9 +19,6 @@ data.set('bindir', bindir)
 data.set('libdir', libdir)
 
 add_project_arguments(
-  '-Wall',
-  '-Wextra',
-  '-Werror',
   '-Wstrict-aliasing',
   '-Wchar-subscripts',
   '-Wformat-security',
diff --git a/src/bash/meson.build b/src/bash/meson.build
index 89ba746..e9e597a 100644
--- a/src/bash/meson.build
+++ b/src/bash/meson.build
@@ -1,7 +1,7 @@
 bashcomp = dependency('bash-completion', required: false)
 
 if bashcomp.found()
-  bashcompdir = bashcomp.get_pkgconfig_variable('completionsdir')
+  bashcompdir = bashcomp.get_variable(pkgconfig : 'completionsdir')
   install_data('clevis', install_dir: bashcompdir)
 else
   warning('Will not install bash completion due to missing dependencies!')
diff --git a/src/luks/dracut/clevis-pin-null/meson.build b/src/luks/dracut/clevis-pin-null/meson.build
index 57278f7..0c7e172 100644
--- a/src/luks/dracut/clevis-pin-null/meson.build
+++ b/src/luks/dracut/clevis-pin-null/meson.build
@@ -1,7 +1,7 @@
 dracut = dependency('dracut', required: false)
 
 if dracut.found()
-  dracutdir = dracut.get_pkgconfig_variable('dracutmodulesdir') + '/50' + meson.project_name() + '-pin-null'
+  dracutdir = dracut.get_variable(pkgconfig : 'dracutmodulesdir') + '/50' + meson.project_name() + '-pin-null'
 
   configure_file(
     input: 'module-setup.sh.in',
diff --git a/src/luks/dracut/clevis-pin-pkcs11/meson.build b/src/luks/dracut/clevis-pin-pkcs11/meson.build
index 689222b..ecd1421 100644
--- a/src/luks/dracut/clevis-pin-pkcs11/meson.build
+++ b/src/luks/dracut/clevis-pin-pkcs11/meson.build
@@ -1,7 +1,7 @@
 dracut = dependency('dracut', required: false)
 
 if dracut.found()
-  dracutdir = dracut.get_pkgconfig_variable('dracutmodulesdir') + '/50' + meson.project_name() + '-pin-pkcs11'
+  dracutdir = dracut.get_variable(pkgconfig : 'dracutmodulesdir') + '/50' + meson.project_name() + '-pin-pkcs11'
 
   configure_file(
     input: 'module-setup.sh.in',
diff --git a/src/luks/dracut/clevis-pin-sss/meson.build b/src/luks/dracut/clevis-pin-sss/meson.build
index c652a9e..34a7345 100644
--- a/src/luks/dracut/clevis-pin-sss/meson.build
+++ b/src/luks/dracut/clevis-pin-sss/meson.build
@@ -1,7 +1,7 @@
 dracut = dependency('dracut', required: false)
 
 if dracut.found()
-  dracutdir = dracut.get_pkgconfig_variable('dracutmodulesdir') + '/50' + meson.project_name() + '-pin-sss'
+  dracutdir = dracut.get_variable(pkgconfig : 'dracutmodulesdir') + '/50' + meson.project_name() + '-pin-sss'
 
   configure_file(
     input: 'module-setup.sh.in',
diff --git a/src/luks/dracut/clevis-pin-tang/meson.build b/src/luks/dracut/clevis-pin-tang/meson.build
index 8e1cfca..92af675 100644
--- a/src/luks/dracut/clevis-pin-tang/meson.build
+++ b/src/luks/dracut/clevis-pin-tang/meson.build
@@ -1,7 +1,7 @@
 dracut = dependency('dracut', required: false)
 
 if dracut.found()
-  dracutdir = dracut.get_pkgconfig_variable('dracutmodulesdir') + '/50' + meson.project_name() + '-pin-tang'
+  dracutdir = dracut.get_variable(pkgconfig : 'dracutmodulesdir') + '/50' + meson.project_name() + '-pin-tang'
 
   configure_file(
     input: 'module-setup.sh.in',
diff --git a/src/luks/dracut/clevis-pin-tpm1/meson.build b/src/luks/dracut/clevis-pin-tpm1/meson.build
index 8e5a675..6515b6a 100644
--- a/src/luks/dracut/clevis-pin-tpm1/meson.build
+++ b/src/luks/dracut/clevis-pin-tpm1/meson.build
@@ -1,7 +1,7 @@
 dracut = dependency('dracut', required: false)
 
 if dracut.found()
-  dracutdir = dracut.get_pkgconfig_variable('dracutmodulesdir') + '/50' + meson.project_name() + '-pin-tpm1'
+  dracutdir = dracut.get_variable(pkgconfig : 'dracutmodulesdir') + '/50' + meson.project_name() + '-pin-tpm1'
 
   configure_file(
     input: 'module-setup.sh.in',
diff --git a/src/luks/dracut/clevis-pin-tpm2/meson.build b/src/luks/dracut/clevis-pin-tpm2/meson.build
index 7863f8b..58990e7 100644
--- a/src/luks/dracut/clevis-pin-tpm2/meson.build
+++ b/src/luks/dracut/clevis-pin-tpm2/meson.build
@@ -1,7 +1,7 @@
 dracut = dependency('dracut', required: false)
 
 if dracut.found()
-  dracutdir = dracut.get_pkgconfig_variable('dracutmodulesdir') + '/50' + meson.project_name() + '-pin-tpm2'
+  dracutdir = dracut.get_variable(pkgconfig : 'dracutmodulesdir') + '/50' + meson.project_name() + '-pin-tpm2'
 
   configure_file(
     input: 'module-setup.sh.in',
diff --git a/src/luks/dracut/clevis/meson.build b/src/luks/dracut/clevis/meson.build
index e6230f3..ca21624 100644
--- a/src/luks/dracut/clevis/meson.build
+++ b/src/luks/dracut/clevis/meson.build
@@ -1,7 +1,7 @@
 dracut = dependency('dracut', required: false)
 
 if dracut.found()
-  dracutdir = dracut.get_pkgconfig_variable('dracutmodulesdir') + '/50' + meson.project_name()
+  dracutdir = dracut.get_variable(pkgconfig : 'dracutmodulesdir') + '/50' + meson.project_name()
 
   dracut_data = configuration_data()
   dracut_data.merge_from(data)
diff --git a/src/luks/meson.build b/src/luks/meson.build
index 6c7b035..5469c3b 100644
--- a/src/luks/meson.build
+++ b/src/luks/meson.build
@@ -42,7 +42,7 @@ clevis_luks_unbind = configure_file(input: 'clevis-luks-unbind.in',
 
 # SystemD dependencies checked here, used both in systemd and dracut subdirs
 systemd = dependency('systemd', required: false)
-systemdutildir = systemd.found() ? systemd.get_pkgconfig_variable('systemdutildir', default: '') : ''
+systemdutildir = systemd.found() ? systemd.get_variable(pkgconfig : 'systemdutildir', default_value: '') : ''
 
 sd_reply_pass = find_program(
   (systemdutildir != '') ? join_paths(systemdutildir, 'systemd-reply-password') : '',
diff --git a/src/luks/tests/meson.build b/src/luks/tests/meson.build
index aebc481..0735219 100644
--- a/src/luks/tests/meson.build
+++ b/src/luks/tests/meson.build
@@ -28,21 +28,21 @@ common_functions = configure_file(input: 'luks-common-test-functions.in',
 
 env = environment()
 env.prepend('PATH',
-  join_paths(meson.source_root(), 'src'),
-  join_paths(meson.source_root(), 'src', 'luks'),
-  join_paths(meson.source_root(), 'src', 'pins', 'sss'),
-  join_paths(meson.source_root(), 'src', 'pins', 'tang'),
-  join_paths(meson.source_root(), 'src', 'pins', 'tpm1'),
-  join_paths(meson.source_root(), 'src', 'pins', 'tpm2'),
+  join_paths(meson.project_source_root(), 'src'),
+  join_paths(meson.project_source_root(), 'src', 'luks'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'sss'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'tang'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'tpm1'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'tpm2'),
   meson.current_source_dir(),
   meson.current_build_dir(),
-  join_paths(meson.build_root(), 'src'),
-  join_paths(meson.build_root(), 'src', 'luks'),
-  join_paths(meson.build_root(), 'src', 'pins', 'sss'),
-  join_paths(meson.build_root(), 'src', 'pins', 'tang'),
-  join_paths(meson.build_root(), 'src', 'pins', 'tang', 'tests'),
-  join_paths(meson.build_root(), 'src', 'pins', 'tpm1'),
-  join_paths(meson.build_root(), 'src', 'pins', 'tpm2'),
+  join_paths(meson.project_build_root(), 'src'),
+  join_paths(meson.project_build_root(), 'src', 'luks'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'sss'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'tang'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'tang', 'tests'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'tpm1'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'tpm2'),
   separator: ':'
 )
 
diff --git a/src/pins/file/meson.build b/src/pins/file/meson.build
index dbd9a56..fd43e14 100644
--- a/src/pins/file/meson.build
+++ b/src/pins/file/meson.build
@@ -8,7 +8,7 @@ mans += join_paths(meson.current_source_dir(), 'clevis-encrypt-file.1')
 
 env = environment()
 env.append('PATH',
-  join_paths(meson.source_root(), 'src'),
+  join_paths(meson.project_source_root(), 'src'),
   meson.current_source_dir(),
   '/usr/libexec',
   libexecdir,
@@ -18,7 +18,7 @@ env.append('PATH',
 test('pin-file', find_program('./pin-file'), env: env)
 
 if dracut.found()
-  dracutdir = dracut.get_pkgconfig_variable('dracutmodulesdir') + '/50' + meson.project_name() + '-pin-file'
+  dracutdir = dracut.get_variable(pkgconfig : 'dracutmodulesdir') + '/50' + meson.project_name() + '-pin-file'
   configure_file(
     input: 'dracut.module-setup.sh.in',
     output: 'module-setup.sh',
diff --git a/src/pins/pkcs11/tests/meson.build b/src/pins/pkcs11/tests/meson.build
index 73ca2f7..998562d 100644
--- a/src/pins/pkcs11/tests/meson.build
+++ b/src/pins/pkcs11/tests/meson.build
@@ -1,22 +1,22 @@
 env = environment()
 env.prepend('PATH',
-  join_paths(meson.source_root(), 'src'),
-  join_paths(meson.source_root(), 'src', 'pins', 'pkcs11'),
-  join_paths(meson.source_root(), 'src', 'pins', 'pkcs11', 'tests'),
-  join_paths(meson.build_root(), 'src'),
-  join_paths(meson.build_root(), 'src', 'pins'),
-  join_paths(meson.build_root(), 'src', 'pins', 'pkcs11'),
-  join_paths(meson.build_root(), 'src', 'pins', 'pkcs11', 'tests'),
-  join_paths(meson.source_root(), 'src'),
-  join_paths(meson.source_root(), 'src', 'luks'),
-  join_paths(meson.source_root(), 'src', 'luks', 'tests'),
-  join_paths(meson.build_root(), 'src'),
-  join_paths(meson.build_root(), 'src', 'luks'),
-  join_paths(meson.build_root(), 'src', 'luks', 'tests'),
-  join_paths(meson.source_root(), 'src', 'pins', 'tang'),
-  join_paths(meson.source_root(), 'src', 'pins', 'tang', 'tests'),
-  join_paths(meson.build_root(), 'src', 'pins', 'tang'),
-  join_paths(meson.build_root(), 'src', 'pins', 'tang', 'tests'),
+  join_paths(meson.project_source_root(), 'src'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'pkcs11'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'pkcs11', 'tests'),
+  join_paths(meson.project_build_root(), 'src'),
+  join_paths(meson.project_build_root(), 'src', 'pins'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'pkcs11'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'pkcs11', 'tests'),
+  join_paths(meson.project_source_root(), 'src'),
+  join_paths(meson.project_source_root(), 'src', 'luks'),
+  join_paths(meson.project_source_root(), 'src', 'luks', 'tests'),
+  join_paths(meson.project_build_root(), 'src'),
+  join_paths(meson.project_build_root(), 'src', 'luks'),
+  join_paths(meson.project_build_root(), 'src', 'luks', 'tests'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'tang'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'tang', 'tests'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'tang'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'tang', 'tests'),
   separator: ':'
 )
 
diff --git a/src/pins/sss/meson.build b/src/pins/sss/meson.build
index 2a5295a..d77fa24 100644
--- a/src/pins/sss/meson.build
+++ b/src/pins/sss/meson.build
@@ -19,8 +19,8 @@ if jansson.found() and libcrypto.found()
 
   env = environment()
   env.prepend('PATH',
-    join_paths(meson.source_root(), 'src'),
-    join_paths(meson.source_root(), 'src', 'pins', 'tang'),
+    join_paths(meson.project_source_root(), 'src'),
+    join_paths(meson.project_source_root(), 'src', 'pins', 'tang'),
     meson.current_build_dir(),
     '/usr/libexec',
     libexecdir,
diff --git a/src/pins/tang/tests/meson.build b/src/pins/tang/tests/meson.build
index 47fa5d6..feb02a9 100644
--- a/src/pins/tang/tests/meson.build
+++ b/src/pins/tang/tests/meson.build
@@ -23,15 +23,15 @@ tang_data.set('TANGD_KEYGEN', '')
 tang_data.set('TANGD', '')
 
 if socat.found()
-  tang_data.set('SOCAT', socat.path())
+  tang_data.set('SOCAT', socat.full_path())
 endif
 
 if kgen.found()
-  tang_data.set('TANGD_KEYGEN', kgen.path())
+  tang_data.set('TANGD_KEYGEN', kgen.full_path())
 endif
 
 if tang.found()
-  tang_data.set('TANGD', tang.path())
+  tang_data.set('TANGD', tang.full_path())
 endif
 
 tang_tests_common = configure_file(
@@ -42,10 +42,10 @@ tang_tests_common = configure_file(
 
 env = environment()
 env.prepend('PATH',
-  join_paths(meson.source_root(), 'src'),
-  join_paths(meson.source_root(), 'src', 'pins', 'tang'),
-  join_paths(meson.build_root(), 'src', 'luks', 'tests'),
-  join_paths(meson.build_root(), 'src', 'pins', 'tang', 'tests'),
+  join_paths(meson.project_source_root(), 'src'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'tang'),
+  join_paths(meson.project_build_root(), 'src', 'luks', 'tests'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'tang', 'tests'),
   separator: ':'
 )
 
diff --git a/src/pins/template/meson.build b/src/pins/template/meson.build
index e307526..5a84aa9 100644
--- a/src/pins/template/meson.build
+++ b/src/pins/template/meson.build
@@ -20,7 +20,7 @@ if curl.found()
 #%# Set up a test environment
   env = environment()
   env.append('PATH',
-    join_paths(meson.source_root(), 'src'),
+    join_paths(meson.project_source_root(), 'src'),
     meson.current_source_dir(),
     '/usr/libexec',
     libexecdir,
@@ -35,7 +35,7 @@ endif
 
 #%# dracut support
 if dracut.found()
-  dracutdir = dracut.get_pkgconfig_variable('dracutmodulesdir') + '/50' + meson.project_name() + '-pin-@pin@'
+  dracutdir = dracut.get_variable(pkgconfig : 'dracutmodulesdir') + '/50' + meson.project_name() + '-pin-@pin@'
 #?# In general, substituation is not needed but it's better to
 #?# stay flexible.
   configure_file(
diff --git a/src/pins/tpm1/tests/meson.build b/src/pins/tpm1/tests/meson.build
index 4f7ebbd..ca1be7d 100644
--- a/src/pins/tpm1/tests/meson.build
+++ b/src/pins/tpm1/tests/meson.build
@@ -1,14 +1,14 @@
 # Tests
 env = environment()
 env.prepend('PATH',
-  join_paths(meson.source_root(), 'src'),
-  join_paths(meson.source_root(), 'src', 'pins', 'tpm1'),
-  join_paths(meson.source_root(), 'src', 'pins', 'tpm1', 'tests'),
-  join_paths(meson.build_root(), 'src'),
-  join_paths(meson.build_root(), 'src', 'luks', 'tests'),
-  join_paths(meson.build_root(), 'src', 'pins', 'tang', 'tests'),
-  join_paths(meson.build_root(), 'src', 'pins', 'tpm1'),
-  join_paths(meson.build_root(), 'src', 'pins', 'tpm1', 'tests'),
+  join_paths(meson.project_source_root(), 'src'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'tpm1'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'tpm1', 'tests'),
+  join_paths(meson.project_build_root(), 'src'),
+  join_paths(meson.project_build_root(), 'src', 'luks', 'tests'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'tang', 'tests'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'tpm1'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'tpm1', 'tests'),
   separator: ':'
 )
 
@@ -23,14 +23,14 @@ tcsd = find_program('tcsd', '/usr/sbin/tcsd', required: false)
 swtpm = find_program('swtpm', '/usr/bin/swtpm', required: false)
 swtpm_setup = find_program('swtpm_setup', '/usr/bin/swtpm_setup', required: false)
 
-tpm1_data.set('TPM_VERSION_BIN', tpm_version.found() ? tpm_version.path() : '')
-tpm1_data.set('TPM_SEALDATA_BIN', tpm_sealdata.found() ? tpm_sealdata.path() : '')
-tpm1_data.set('TPM_UNSEALDATA_BIN', tpm_unsealdata.found() ? tpm_unsealdata.path() : '')
-tpm1_data.set('TPM_TAKEOWNERSHIP_BIN', tpm_takeownership.found() ? tpm_takeownership.path() : '')
-tpm1_data.set('TCSD_BIN', tcsd.found() ? tcsd.path() : '')
-tpm1_data.set('SWTPM_BIN', swtpm.found() ? swtpm.path() : '')
-tpm1_data.set('SWTPM_SETUP_BIN', swtpm_setup.found() ? swtpm_setup.path() : '')
-tpm1_data.set('LIBCLEVIS_TPM1_TCSD_PRELOAD', libclevis_tpm1_tcsd_preload.path())
+tpm1_data.set('TPM_VERSION_BIN', tpm_version.found() ? tpm_version.full_path() : '')
+tpm1_data.set('TPM_SEALDATA_BIN', tpm_sealdata.found() ? tpm_sealdata.full_path() : '')
+tpm1_data.set('TPM_UNSEALDATA_BIN', tpm_unsealdata.found() ? tpm_unsealdata.full_path() : '')
+tpm1_data.set('TPM_TAKEOWNERSHIP_BIN', tpm_takeownership.found() ? tpm_takeownership.full_path() : '')
+tpm1_data.set('TCSD_BIN', tcsd.found() ? tcsd.full_path() : '')
+tpm1_data.set('SWTPM_BIN', swtpm.found() ? swtpm.full_path() : '')
+tpm1_data.set('SWTPM_SETUP_BIN', swtpm_setup.found() ? swtpm_setup.full_path() : '')
+tpm1_data.set('LIBCLEVIS_TPM1_TCSD_PRELOAD', libclevis_tpm1_tcsd_preload.full_path())
 
 configure_file(
   input: 'tpm1-common-test-functions.in',
diff --git a/src/pins/tpm2/tests/meson.build b/src/pins/tpm2/tests/meson.build
index f3e21e1..cd0d15d 100644
--- a/src/pins/tpm2/tests/meson.build
+++ b/src/pins/tpm2/tests/meson.build
@@ -1,20 +1,20 @@
 # Tests.
 env = environment()
 env.prepend('PATH',
-  join_paths(meson.source_root(), 'src'),
-  join_paths(meson.source_root(), 'src', 'luks'),
-  join_paths(meson.source_root(), 'src', 'luks', 'tests'),
-  join_paths(meson.source_root(), 'src', 'pins', 'sss'),
-  join_paths(meson.source_root(), 'src', 'pins', 'tang'),
-  join_paths(meson.source_root(), 'src', 'pins', 'tpm2'),
-  join_paths(meson.source_root(), 'src', 'pins', 'tpm2', 'tests'),
-  join_paths(meson.build_root(), 'src'),
-  join_paths(meson.build_root(), 'src', 'luks'),
-  join_paths(meson.build_root(), 'src', 'luks', 'tests'),
-  join_paths(meson.build_root(), 'src', 'pins', 'sss'),
-  join_paths(meson.build_root(), 'src', 'pins', 'tang'),
-  join_paths(meson.build_root(), 'src', 'pins', 'tpm2'),
-  join_paths(meson.build_root(), 'src', 'pins', 'tpm2', 'tests'),
+  join_paths(meson.project_source_root(), 'src'),
+  join_paths(meson.project_source_root(), 'src', 'luks'),
+  join_paths(meson.project_source_root(), 'src', 'luks', 'tests'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'sss'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'tang'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'tpm2'),
+  join_paths(meson.project_source_root(), 'src', 'pins', 'tpm2', 'tests'),
+  join_paths(meson.project_build_root(), 'src'),
+  join_paths(meson.project_build_root(), 'src', 'luks'),
+  join_paths(meson.project_build_root(), 'src', 'luks', 'tests'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'sss'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'tang'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'tpm2'),
+  join_paths(meson.project_build_root(), 'src', 'pins', 'tpm2', 'tests'),
   separator: ':'
 )
 
@@ -25,9 +25,9 @@ socat = find_program('socat', required: false)
 swtpm = find_program('swtpm', '/usr/bin/swtpm', required: false)
 swtpm_setup = find_program('swtpm_setup', '/usr/bin/swtpm_setup', required: false)
 
-tpm2_data.set('SOCAT_BIN', socat.found() ? socat.path() : '')
-tpm2_data.set('SWTPM_BIN', swtpm.found() ? swtpm.path() : '')
-tpm2_data.set('SWTPM_SETUP_BIN', swtpm_setup.found() ? swtpm_setup.path() : '')
+tpm2_data.set('SOCAT_BIN', socat.found() ? socat.full_path() : '')
+tpm2_data.set('SWTPM_BIN', swtpm.found() ? swtpm.full_path() : '')
+tpm2_data.set('SWTPM_SETUP_BIN', swtpm_setup.found() ? swtpm_setup.full_path() : '')
 
 configure_file(
   input: 'tpm2-common-test-functions.in',