diff --git a/.builds/build-flatpak.yml b/.builds/build-flatpak.yml
index a11d57a..1dd10dd 100644
--- a/.builds/build-flatpak.yml
+++ b/.builds/build-flatpak.yml
@@ -15,6 +15,8 @@ sources:
   - https://git.sr.ht/~sumner/sublime-music
 environment:
   REPO_NAME: sublime-music
+artifacts:
+  - sublime-music/flatpak/sublime-music.flatpak
 # triggers:
 #   - action: email
 #     condition: failure
diff --git a/.envrc b/.envrc
index 5f77a24..446206f 100644
--- a/.envrc
+++ b/.envrc
@@ -1,7 +1,17 @@
-# Run poetry install and activate the virtualenv
-poetry install -E chromecast -E keyring -E server
+use nix
+
+# Run poetry install if there's not a virtualenv already.
+if [[ ! -d .venv ]]; then
+    echo "No virtualenv found, installing dependencies using Poetry..."
+    poetry install -E chromecast -E keyring -E server
+fi
+
+# Activate the virtualenv
 source .venv/bin/activate
 
 watch_file pyproject.toml
 watch_file poetry.lock
 watch_file setup.py
+watch_file shell.nix
+
+unset PS1
diff --git a/.gitignore b/.gitignore
index dfdcb48..63f0105 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+.direnv
 flatpak/flatpak_build_dir/
 flatpak/sublime-music.flatpak
 flatpak/repo
diff --git a/.vim/coc-settings.json b/.vim/coc-settings.json
index eb8897c..cc71be6 100644
--- a/.vim/coc-settings.json
+++ b/.vim/coc-settings.json
@@ -1,5 +1,4 @@
 {
-  "python.jediEnabled": false,
   "python.analysis.openFilesOnly": false,
   "python.linting.pylintEnabled": false,
   "python.linting.flake8Enabled": true,
diff --git a/poetry.lock b/poetry.lock
index efe467e..312db9f 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -21,7 +21,6 @@ description = "Atomic file writes."
 category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-marker = "sys_platform == \"win32\""
 
 [[package]]
 name = "attrs"
@@ -32,10 +31,10 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [package.extras]
-dev = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "sphinx", "sphinx-rtd-theme", "pre-commit"]
+dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "sphinx", "sphinx-rtd-theme", "pre-commit"]
 docs = ["sphinx", "sphinx-rtd-theme", "zope.interface"]
-tests = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
-tests_no_zope = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
+tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
 
 [[package]]
 name = "babel"
@@ -56,10 +55,6 @@ category = "dev"
 optional = false
 python-versions = ">=3.6"
 
-[package.extras]
-colorama = ["colorama (>=0.4.3)"]
-d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
-
 [package.dependencies]
 appdirs = "*"
 click = ">=7.1.2"
@@ -70,6 +65,10 @@ toml = ">=0.10.1"
 typed-ast = ">=1.4.0"
 typing-extensions = ">=3.7.4"
 
+[package.extras]
+colorama = ["colorama (>=0.4.3)"]
+d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
+
 [[package]]
 name = "bleach"
 version = "3.2.1"
@@ -117,7 +116,6 @@ description = "Foreign Function Interface for Python calling C code."
 category = "main"
 optional = true
 python-versions = "*"
-marker = "sys_platform == \"linux\""
 
 [package.dependencies]
 pycparser = "*"
@@ -145,7 +143,6 @@ description = "Cross-platform colored terminal text."
 category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-marker = "sys_platform == \"win32\""
 
 [[package]]
 name = "coverage"
@@ -165,7 +162,10 @@ description = "cryptography is a package which provides cryptographic recipes an
 category = "main"
 optional = true
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*"
-marker = "sys_platform == \"linux\""
+
+[package.dependencies]
+cffi = ">=1.8,<1.11.3 || >1.11.3"
+six = ">=1.4.1"
 
 [package.extras]
 docs = ["sphinx (>=1.6.5,<1.8.0 || >1.8.0,<3.1.0 || >3.1.0,<3.1.1 || >3.1.1)", "sphinx-rtd-theme"]
@@ -174,10 +174,6 @@ pep8test = ["black", "flake8", "flake8-import-order", "pep8-naming"]
 ssh = ["bcrypt (>=3.1.5)"]
 test = ["pytest (>=3.6.0,<3.9.0 || >3.9.0,<3.9.1 || >3.9.1,<3.9.2 || >3.9.2)", "pretend", "iso8601", "pytz", "hypothesis (>=1.11.4,<3.79.2 || >3.79.2)"]
 
-[package.dependencies]
-cffi = ">=1.8,<1.11.3 || >1.11.3"
-six = ">=1.4.1"
-
 [[package]]
 name = "dataclasses-json"
 version = "0.5.2"
@@ -186,15 +182,15 @@ category = "main"
 optional = false
 python-versions = ">=3.6"
 
-[package.extras]
-dev = ["pytest", "ipython", "mypy (>=0.710)", "hypothesis", "portray", "flake8", "simplejson"]
-
 [package.dependencies]
 marshmallow = ">=3.3.0,<4.0.0"
 marshmallow-enum = ">=1.5.1,<2.0.0"
 stringcase = "1.2.0"
 typing-inspect = ">=0.4.0"
 
+[package.extras]
+dev = ["pytest", "ipython", "mypy (>=0.710)", "hypothesis", "portray", "flake8", "simplejson"]
+
 [[package]]
 name = "deepdiff"
 version = "5.0.2"
@@ -203,12 +199,12 @@ category = "main"
 optional = false
 python-versions = ">=3.5"
 
-[package.extras]
-murmur = ["mmh3"]
-
 [package.dependencies]
 ordered-set = ">=4.0.1"
 
+[package.extras]
+murmur = ["mmh3"]
+
 [[package]]
 name = "docutils"
 version = "0.16"
@@ -219,7 +215,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "flake8"
-version = "3.8.3"
+version = "3.8.4"
 description = "the modular source code checker: pep8 pyflakes and co"
 category = "dev"
 optional = false
@@ -232,7 +228,7 @@ pyflakes = ">=2.2.0,<2.3.0"
 
 [[package]]
 name = "flake8-annotations"
-version = "2.4.0"
+version = "2.4.1"
 description = "Flake8 Type Annotation Checks"
 category = "dev"
 optional = false
@@ -274,7 +270,6 @@ python-versions = "*"
 
 [package.dependencies]
 pycodestyle = "*"
-setuptools = "*"
 
 [[package]]
 name = "flake8-pep3101"
@@ -284,12 +279,12 @@ category = "dev"
 optional = false
 python-versions = "*"
 
-[package.extras]
-test = ["pytest", "testfixtures"]
-
 [package.dependencies]
 flake8 = ">=3.0"
 
+[package.extras]
+test = ["pytest", "testfixtures"]
+
 [[package]]
 name = "flake8-print"
 version = "3.1.4"
@@ -365,7 +360,6 @@ description = "Low-level, pure Python DBus protocol wrapper."
 category = "main"
 optional = true
 python-versions = ">=3.5"
-marker = "sys_platform == \"linux\""
 
 [package.extras]
 dev = ["testpath"]
@@ -378,12 +372,12 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
-[package.extras]
-i18n = ["Babel (>=0.8)"]
-
 [package.dependencies]
 MarkupSafe = ">=0.23"
 
+[package.extras]
+i18n = ["Babel (>=0.8)"]
+
 [[package]]
 name = "keyring"
 version = "21.4.0"
@@ -392,15 +386,15 @@ category = "main"
 optional = true
 python-versions = ">=3.6"
 
+[package.dependencies]
+jeepney = {version = ">=0.4.2", markers = "sys_platform == \"linux\""}
+pywin32-ctypes = {version = "<0.1.0 || >0.1.0,<0.1.1 || >0.1.1", markers = "sys_platform == \"win32\""}
+SecretStorage = {version = ">=3", markers = "sys_platform == \"linux\""}
+
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["pytest (>=3.5,<3.7.3 || >3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-black (>=0.3.7)", "pytest-cov", "pytest-mypy"]
 
-[package.dependencies]
-jeepney = ">=0.4.2"
-pywin32-ctypes = "<0.1.0 || >0.1.0,<0.1.1 || >0.1.1"
-SecretStorage = ">=3"
-
 [[package]]
 name = "markupsafe"
 version = "1.1.1"
@@ -442,14 +436,6 @@ category = "dev"
 optional = false
 python-versions = "*"
 
-[[package]]
-name = "more-itertools"
-version = "8.5.0"
-description = "More routines for operating on iterables, beyond itertools"
-category = "dev"
-optional = false
-python-versions = ">=3.5"
-
 [[package]]
 name = "mypy"
 version = "0.782"
@@ -458,14 +444,14 @@ category = "dev"
 optional = false
 python-versions = ">=3.5"
 
-[package.extras]
-dmypy = ["psutil (>=4.0)"]
-
 [package.dependencies]
 mypy-extensions = ">=0.4.3,<0.5.0"
 typed-ast = ">=1.4.0,<1.5.0"
 typing-extensions = ">=3.7.4"
 
+[package.extras]
+dmypy = ["psutil (>=4.0)"]
+
 [[package]]
 name = "mypy-extensions"
 version = "0.4.3"
@@ -530,7 +516,6 @@ optional = true
 python-versions = "*"
 
 [package.dependencies]
-setuptools = "*"
 six = ">=1.9"
 
 [[package]]
@@ -543,15 +528,15 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "pycairo"
-version = "1.19.1"
+version = "1.20.0"
 description = "Python interface for cairo"
 category = "main"
 optional = false
-python-versions = ">=3.5, <4"
+python-versions = ">=3.6, <4"
 
 [[package]]
 name = "pychromecast"
-version = "7.3.0"
+version = "7.5.0"
 description = "Python module to talk to Google Chromecast."
 category = "main"
 optional = true
@@ -578,7 +563,6 @@ description = "C parser in Python"
 category = "main"
 optional = true
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-marker = "sys_platform == \"linux\""
 
 [[package]]
 name = "pyflakes"
@@ -617,27 +601,26 @@ python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "pytest"
-version = "6.0.2"
+version = "6.1.1"
 description = "pytest: simple powerful testing with Python"
 category = "dev"
 optional = false
 python-versions = ">=3.5"
 
-[package.extras]
-checkqa_mypy = ["mypy (0.780)"]
-testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
-
 [package.dependencies]
-atomicwrites = ">=1.0"
+atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
 attrs = ">=17.4.0"
-colorama = "*"
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
 iniconfig = "*"
-more-itertools = ">=4.0.0"
 packaging = "*"
 pluggy = ">=0.12,<1.0"
 py = ">=1.8.2"
 toml = "*"
 
+[package.extras]
+checkqa_mypy = ["mypy (0.780)"]
+testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
+
 [[package]]
 name = "pytest-cov"
 version = "2.10.1"
@@ -646,13 +629,13 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
-[package.extras]
-testing = ["fields", "hunter", "process-tests (2.0.2)", "six", "pytest-xdist", "virtualenv"]
-
 [package.dependencies]
 coverage = ">=4.4"
 pytest = ">=4.6"
 
+[package.extras]
+testing = ["fields", "hunter", "process-tests (2.0.2)", "six", "pytest-xdist", "virtualenv"]
+
 [[package]]
 name = "python-dateutil"
 version = "2.8.1"
@@ -672,9 +655,6 @@ category = "main"
 optional = false
 python-versions = "*"
 
-[package.dependencies]
-setuptools = "*"
-
 [[package]]
 name = "python-mpv"
 version = "0.5.2"
@@ -701,11 +681,10 @@ description = ""
 category = "main"
 optional = true
 python-versions = "*"
-marker = "sys_platform == \"win32\""
 
 [[package]]
 name = "regex"
-version = "2020.7.14"
+version = "2020.10.11"
 description = "Alternative regular expression module, to replace re."
 category = "dev"
 optional = false
@@ -719,16 +698,16 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
-[package.extras]
-security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
-
 [package.dependencies]
 certifi = ">=2017.4.17"
 chardet = ">=3.0.2,<4"
 idna = ">=2.5,<3"
 urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
 
+[package.extras]
+security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
+socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
+
 [[package]]
 name = "requirements-parser"
 version = "0.2.0"
@@ -757,7 +736,6 @@ description = "Python bindings to FreeDesktop.org Secret Service API"
 category = "main"
 optional = true
 python-versions = ">=3.5"
-marker = "sys_platform == \"linux\""
 
 [package.dependencies]
 cryptography = "*"
@@ -795,22 +773,16 @@ category = "dev"
 optional = false
 python-versions = ">=3.5"
 
-[package.extras]
-docs = ["sphinxcontrib-websupport"]
-lint = ["flake8 (>=3.5.0)", "flake8-import-order", "mypy (>=0.780)", "docutils-stubs"]
-test = ["pytest", "pytest-cov", "html5lib", "typed-ast", "cython"]
-
 [package.dependencies]
 alabaster = ">=0.7,<0.8"
 babel = ">=1.3"
-colorama = ">=0.3.5"
+colorama = {version = ">=0.3.5", markers = "sys_platform == \"win32\""}
 docutils = ">=0.12"
 imagesize = "*"
 Jinja2 = ">=2.3"
 packaging = "*"
 Pygments = ">=2.0"
 requests = ">=2.5.0"
-setuptools = "*"
 snowballstemmer = ">=1.1"
 sphinxcontrib-applehelp = "*"
 sphinxcontrib-devhelp = "*"
@@ -819,6 +791,11 @@ sphinxcontrib-jsmath = "*"
 sphinxcontrib-qthelp = "*"
 sphinxcontrib-serializinghtml = "*"
 
+[package.extras]
+docs = ["sphinxcontrib-websupport"]
+lint = ["flake8 (>=3.5.0)", "flake8-import-order", "mypy (>=0.780)", "docutils-stubs"]
+test = ["pytest", "pytest-cov", "html5lib", "typed-ast", "cython"]
+
 [[package]]
 name = "sphinx-rtd-theme"
 version = "0.5.0"
@@ -827,12 +804,12 @@ category = "dev"
 optional = false
 python-versions = "*"
 
-[package.extras]
-dev = ["transifex-client", "sphinxcontrib-httpdomain", "bump2version"]
-
 [package.dependencies]
 sphinx = "*"
 
+[package.extras]
+dev = ["transifex-client", "sphinxcontrib-httpdomain", "bump2version"]
+
 [[package]]
 name = "sphinxcontrib-applehelp"
 version = "1.0.2"
@@ -994,7 +971,7 @@ keyring = ["keyring"]
 server = ["bottle"]
 
 [metadata]
-lock-version = "1.0"
+lock-version = "1.1"
 python-versions = "^3.8"
 content-hash = "8f2347fd5d6fb642a38a353623b5176a1c6766317c5bb165ef48779663b31d38"
 
@@ -1161,12 +1138,12 @@ docutils = [
     {file = "docutils-0.16.tar.gz", hash = "sha256:c2de3a60e9e7d07be26b7f2b00ca0309c207e06c100f9cc2a94931fc75a478fc"},
 ]
 flake8 = [
-    {file = "flake8-3.8.3-py2.py3-none-any.whl", hash = "sha256:15e351d19611c887e482fb960eae4d44845013cc142d42896e9862f775d8cf5c"},
-    {file = "flake8-3.8.3.tar.gz", hash = "sha256:f04b9fcbac03b0a3e58c0ab3a0ecc462e023a9faf046d57794184028123aa208"},
+    {file = "flake8-3.8.4-py2.py3-none-any.whl", hash = "sha256:749dbbd6bfd0cf1318af27bf97a14e28e5ff548ef8e5b1566ccfb25a11e7c839"},
+    {file = "flake8-3.8.4.tar.gz", hash = "sha256:aadae8761ec651813c24be05c6f7b4680857ef6afaae4651a4eccaef97ce6c3b"},
 ]
 flake8-annotations = [
-    {file = "flake8-annotations-2.4.0.tar.gz", hash = "sha256:09fe1aa3f40cb8fef632a0ab3614050a7584bb884b6134e70cf1fc9eeee642fa"},
-    {file = "flake8_annotations-2.4.0-py3-none-any.whl", hash = "sha256:5bda552f074fd6e34276c7761756fa07d824ffac91ce9c0a8555eb2bc5b92d7a"},
+    {file = "flake8-annotations-2.4.1.tar.gz", hash = "sha256:0bcebb0792f1f96d617ded674dca7bf64181870bfe5dace353a1483551f8e5f1"},
+    {file = "flake8_annotations-2.4.1-py3-none-any.whl", hash = "sha256:bebd11a850f6987a943ce8cdff4159767e0f5f89b3c88aca64680c2175ee02df"},
 ]
 flake8-bugbear = [
     {file = "flake8-bugbear-20.1.4.tar.gz", hash = "sha256:bd02e4b009fb153fe6072c31c52aeab5b133d508095befb2ffcf3b41c4823162"},
@@ -1270,10 +1247,6 @@ mccabe = [
     {file = "mccabe-0.6.1-py2.py3-none-any.whl", hash = "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42"},
     {file = "mccabe-0.6.1.tar.gz", hash = "sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f"},
 ]
-more-itertools = [
-    {file = "more-itertools-8.5.0.tar.gz", hash = "sha256:6f83822ae94818eae2612063a5101a7311e68ae8002005b5e05f03fd74a86a20"},
-    {file = "more_itertools-8.5.0-py3-none-any.whl", hash = "sha256:9b30f12df9393f0d28af9210ff8efe48d10c94f73e5daf886f10c4b0b0b4f03c"},
-]
 mypy = [
     {file = "mypy-0.782-cp35-cp35m-macosx_10_6_x86_64.whl", hash = "sha256:2c6cde8aa3426c1682d35190b59b71f661237d74b053822ea3d748e2c9578a7c"},
     {file = "mypy-0.782-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:9c7a9a7ceb2871ba4bac1cf7217a7dd9ccd44c27c2950edbc6dc08530f32ad4e"},
@@ -1337,11 +1310,17 @@ py = [
     {file = "py-1.9.0.tar.gz", hash = "sha256:9ca6883ce56b4e8da7e79ac18787889fa5206c79dcc67fb065376cd2fe03f342"},
 ]
 pycairo = [
-    {file = "pycairo-1.19.1.tar.gz", hash = "sha256:2c143183280feb67f5beb4e543fd49990c28e7df427301ede04fc550d3562e84"},
+    {file = "pycairo-1.20.0-cp36-cp36m-win32.whl", hash = "sha256:e5a3433690c473e073a9917dc8f1fc7dc8b9af7b201bf372894b8ad70d960c6d"},
+    {file = "pycairo-1.20.0-cp36-cp36m-win_amd64.whl", hash = "sha256:a942614923b88ae75c794506d5c426fba9c46a055d3fdd3b8db7046b75c079cc"},
+    {file = "pycairo-1.20.0-cp37-cp37m-win32.whl", hash = "sha256:8cfa9578b745fb9cf2915ec580c2c50ebc2da00eac2cf4c4b54b63aa19da4b77"},
+    {file = "pycairo-1.20.0-cp37-cp37m-win_amd64.whl", hash = "sha256:273a33c56aba724ec42fe1d8f94c86c2e2660c1277470be9b04e5113d7c5b72d"},
+    {file = "pycairo-1.20.0-cp38-cp38-win32.whl", hash = "sha256:2088100a099c09c5e90bf247409ce6c98f51766b53bd13f96d6aac7addaa3e66"},
+    {file = "pycairo-1.20.0-cp38-cp38-win_amd64.whl", hash = "sha256:ceb1edcbeb48dabd5fbbdff2e4b429aa88ddc493d6ebafe78d94b050ac0749e2"},
+    {file = "pycairo-1.20.0.tar.gz", hash = "sha256:5695a10cb7f9ae0d01f665b56602a845b0a8cb17e2123bfece10c2e58552468c"},
 ]
 pychromecast = [
-    {file = "PyChromecast-7.3.0-py2.py3-none-any.whl", hash = "sha256:182ee414f7de227f2e55d6444bd59d31282bac4d1d63f0f3ca1f19725c5ba4bf"},
-    {file = "PyChromecast-7.3.0.tar.gz", hash = "sha256:f594231efb34b86eeb463611662bca21a6962793885d3ad68195286940f7473d"},
+    {file = "PyChromecast-7.5.0-py2.py3-none-any.whl", hash = "sha256:5dba13fa47ee83b08511231bcb35bdec0394a9f1338059e416e28047548795e4"},
+    {file = "PyChromecast-7.5.0.tar.gz", hash = "sha256:2f346a88ddc27a19cc68bc2d3e8929d89276298cb1c11871b82a87fbdafb95a8"},
 ]
 pycodestyle = [
     {file = "pycodestyle-2.6.0-py2.py3-none-any.whl", hash = "sha256:2295e7b2f6b5bd100585ebcb1f616591b652db8a741695b3d8f5d28bdc934367"},
@@ -1367,8 +1346,8 @@ pyparsing = [
     {file = "pyparsing-2.4.7.tar.gz", hash = "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1"},
 ]
 pytest = [
-    {file = "pytest-6.0.2-py3-none-any.whl", hash = "sha256:0e37f61339c4578776e090c3b8f6b16ce4db333889d65d0efb305243ec544b40"},
-    {file = "pytest-6.0.2.tar.gz", hash = "sha256:c8f57c2a30983f469bf03e68cdfa74dc474ce56b8f280ddcb080dfd91df01043"},
+    {file = "pytest-6.1.1-py3-none-any.whl", hash = "sha256:7a8190790c17d79a11f847fba0b004ee9a8122582ebff4729a082c109e81a4c9"},
+    {file = "pytest-6.1.1.tar.gz", hash = "sha256:8f593023c1a0f916110285b6efd7f99db07d59546e3d8c36fc60e2ab05d3be92"},
 ]
 pytest-cov = [
     {file = "pytest-cov-2.10.1.tar.gz", hash = "sha256:47bd0ce14056fdd79f93e1713f88fad7bdcc583dcd7783da86ef2f085a0bb88e"},
@@ -1393,27 +1372,33 @@ pywin32-ctypes = [
     {file = "pywin32_ctypes-0.2.0-py2.py3-none-any.whl", hash = "sha256:9dc2d991b3479cc2df15930958b674a48a227d5361d413827a4cfd0b5876fc98"},
 ]
 regex = [
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-    {file = "regex-2020.7.14-cp27-cp27m-win_amd64.whl", hash = "sha256:6961548bba529cac7c07af2fd4d527c5b91bb8fe18995fed6044ac22b3d14644"},
-    {file = "regex-2020.7.14-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:c50a724d136ec10d920661f1442e4a8b010a4fe5aebd65e0c2241ea41dbe93dc"},
-    {file = "regex-2020.7.14-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:8a51f2c6d1f884e98846a0a9021ff6861bdb98457879f412fdc2b42d14494067"},
-    {file = "regex-2020.7.14-cp36-cp36m-manylinux2010_i686.whl", hash = "sha256:9c568495e35599625f7b999774e29e8d6b01a6fb684d77dee1f56d41b11b40cd"},
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-    {file = "regex-2020.7.14-cp37-cp37m-manylinux2010_x86_64.whl", hash = "sha256:bc3d98f621898b4a9bc7fecc00513eec8f40b5b83913d74ccb445f037d58cd89"},
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-    {file = "regex-2020.7.14.tar.gz", hash = "sha256:3a3af27a8d23143c49a3420efe5b3f8cf1a48c6fc8bc6856b03f638abc1833bb"},
+    {file = "regex-2020.10.11-cp27-cp27m-win32.whl", hash = "sha256:4f5c0fe46fb79a7adf766b365cae56cafbf352c27358fda811e4a1dc8216d0db"},
+    {file = "regex-2020.10.11-cp27-cp27m-win_amd64.whl", hash = "sha256:39a5ef30bca911f5a8a3d4476f5713ed4d66e313d9fb6755b32bec8a2e519635"},
+    {file = "regex-2020.10.11-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:7c4fc5a8ec91a2254bb459db27dbd9e16bba1dabff638f425d736888d34aaefa"},
+    {file = "regex-2020.10.11-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:d537e270b3e6bfaea4f49eaf267984bfb3628c86670e9ad2a257358d3b8f0955"},
+    {file = "regex-2020.10.11-cp36-cp36m-manylinux2010_i686.whl", hash = "sha256:a8240df4957a5b0e641998a5d78b3c4ea762c845d8cb8997bf820626826fde9a"},
+    {file = "regex-2020.10.11-cp36-cp36m-manylinux2010_x86_64.whl", hash = "sha256:4302153abb96859beb2c778cc4662607a34175065fc2f33a21f49eb3fbd1ccd3"},
+    {file = "regex-2020.10.11-cp36-cp36m-win32.whl", hash = "sha256:c077c9d04a040dba001cf62b3aff08fd85be86bccf2c51a770c77377662a2d55"},
+    {file = "regex-2020.10.11-cp36-cp36m-win_amd64.whl", hash = "sha256:46ab6070b0d2cb85700b8863b3f5504c7f75d8af44289e9562195fe02a8dd72d"},
+    {file = "regex-2020.10.11-cp37-cp37m-manylinux1_i686.whl", hash = "sha256:d629d750ebe75a88184db98f759633b0a7772c2e6f4da529f0027b4a402c0e2f"},
+    {file = "regex-2020.10.11-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:8e7ef296b84d44425760fe813cabd7afbb48c8dd62023018b338bbd9d7d6f2f0"},
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+    {file = "regex-2020.10.11-cp37-cp37m-win_amd64.whl", hash = "sha256:8ba3efdd60bfee1aa784dbcea175eb442d059b576934c9d099e381e5a9f48930"},
+    {file = "regex-2020.10.11-cp38-cp38-manylinux1_i686.whl", hash = "sha256:2308491b3e6c530a3bb38a8a4bb1dc5fd32cbf1e11ca623f2172ba17a81acef1"},
+    {file = "regex-2020.10.11-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:b8806649983a1c78874ec7e04393ef076805740f6319e87a56f91f1767960212"},
+    {file = "regex-2020.10.11-cp38-cp38-manylinux2010_i686.whl", hash = "sha256:a2a31ee8a354fa3036d12804730e1e20d58bc4e250365ead34b9c30bbe9908c3"},
+    {file = "regex-2020.10.11-cp38-cp38-manylinux2010_x86_64.whl", hash = "sha256:d9d53518eeed12190744d366ec4a3f39b99d7daa705abca95f87dd8b442df4ad"},
+    {file = "regex-2020.10.11-cp38-cp38-win32.whl", hash = "sha256:3d5a8d007116021cf65355ada47bf405656c4b3b9a988493d26688275fde1f1c"},
+    {file = "regex-2020.10.11-cp38-cp38-win_amd64.whl", hash = "sha256:f579caecbbca291b0fcc7d473664c8c08635da2f9b1567c22ea32311c86ef68c"},
+    {file = "regex-2020.10.11-cp39-cp39-manylinux1_i686.whl", hash = "sha256:8c8c42aa5d3ac9a49829c4b28a81bebfa0378996f9e0ca5b5ab8a36870c3e5ee"},
+    {file = "regex-2020.10.11-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:c529ba90c1775697a65b46c83d47a2d3de70f24d96da5d41d05a761c73b063af"},
+    {file = "regex-2020.10.11-cp39-cp39-manylinux2010_i686.whl", hash = "sha256:6cf527ec2f3565248408b61dd36e380d799c2a1047eab04e13a2b0c15dd9c767"},
+    {file = "regex-2020.10.11-cp39-cp39-manylinux2010_x86_64.whl", hash = "sha256:671c51d352cfb146e48baee82b1ee8d6ffe357c292f5e13300cdc5c00867ebfc"},
+    {file = "regex-2020.10.11-cp39-cp39-win32.whl", hash = "sha256:a63907332531a499b8cdfd18953febb5a4c525e9e7ca4ac147423b917244b260"},
+    {file = "regex-2020.10.11-cp39-cp39-win_amd64.whl", hash = "sha256:1a16afbfadaadc1397353f9b32e19a65dc1d1804c80ad73a14f435348ca017ad"},
+    {file = "regex-2020.10.11.tar.gz", hash = "sha256:463e770c48da76a8da82b8d4a48a541f314e0df91cbb6d873a341dbe578efafd"},
 ]
 requests = [
     {file = "requests-2.24.0-py2.py3-none-any.whl", hash = "sha256:fe75cc94a9443b9246fc7049224f75604b113c36acb93f87b80ed42c44cbb898"},
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..62d9fb6
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,35 @@
+{ pkgs ? import <nixpkgs> {} }: with pkgs;
+pkgs.mkShell {
+  nativeBuildInputs = [
+    gobject-introspection
+    python3Packages.setuptools
+    wrapGAppsHook
+  ];
+
+  buildInputs = [
+    flatpak
+    flatpak-builder
+    gcc
+    git
+    glib
+    gobjectIntrospection
+    gtk3
+    libnotify
+    pango
+    pkgconfig
+  ];
+
+  propagatedBuildInputs = with pkgs; [
+    cairo
+    mpv
+    poetry
+    python38
+    rnix-lsp
+  ];
+
+  shellHook = ''
+    export LD_LIBRARY_PATH=${pkgs.mpv}/lib
+    export XDG_DATA_DIRS="$GSETTINGS_SCHEMA_PATH:${pkgs.arc-theme}/share:${pkgs.arc-icon-theme}/share"
+    export SOURCE_DATE_EPOCH=315532800
+  '';
+}
diff --git a/sublime_music/__main__.py b/sublime_music/__main__.py
index a4a18e7..6cfb557 100644
--- a/sublime_music/__main__.py
+++ b/sublime_music/__main__.py
@@ -39,7 +39,7 @@ def main():
 
     min_log_level = getattr(logging, args.loglevel.upper(), None)
     if not isinstance(min_log_level, int):
-        logging.error(f"Invalid log level: {args.loglevel.upper()}.")
+        print(f"Invalid log level: {args.loglevel.upper()}.")  # noqa: T001
         min_log_level = logging.WARNING
 
     logging.basicConfig(
diff --git a/sublime_music/adapters/subsonic/adapter.py b/sublime_music/adapters/subsonic/adapter.py
index 2d47d97..dd2ad77 100644
--- a/sublime_music/adapters/subsonic/adapter.py
+++ b/sublime_music/adapters/subsonic/adapter.py
@@ -52,9 +52,6 @@ try:
 except Exception:
     # I really don't care what kind of exception it is, all that matters is the
     # import failed for some reason.
-    logging.warning(
-        "Unable to import NM from GLib. Detection of SSID will be disabled."
-    )
     networkmanager_imported = False
 
 REQUEST_DELAY: Optional[Tuple[float, float]] = None
diff --git a/sublime_music/players/chromecast.py b/sublime_music/players/chromecast.py
index 0c72fe4..7240a91 100644
--- a/sublime_music/players/chromecast.py
+++ b/sublime_music/players/chromecast.py
@@ -116,7 +116,7 @@ class ChromecastPlayer(Player):
             return
 
         if self.stop_get_chromecasts is not None:
-            self.stop_get_chromecasts()
+            self.stop_get_chromecasts.cancel()
 
         for id_, chromecast in self._chromecasts.items():
             self.player_device_change_callback(