3 files changed, 6 insertions, 5 deletions

diff --git a/.direnv/flake-profile b/.direnv/flake-profile
index 5d2798d..e97bba5 120000
--- a/.direnv/flake-profile
+++ b/.direnv/flake-profile
@@ -1 +1 @@
-/nix/store/w4hwpczf7xldw1qvgmwc63j4yzrr14nh-nix-shell-env
\ No newline at end of file
+/nix/store/yq217869178i3m4dyv23p8g2ap6f4vds-nix-shell-env
\ No newline at end of file
diff --git a/.direnv/flake-profile.rc b/.direnv/flake-profile.rc
index 40c99ee..82e670b 100644
--- a/.direnv/flake-profile.rc
+++ b/.direnv/flake-profile.rc
@@ -32,7 +32,7 @@ NIX_CC=/nix/store/ca37d3qrydh0wpw40kswsx30j8dyzxh2-gcc-wrapper-10.2.0
 export NIX_CC
 NIX_CC_WRAPPER_TARGET_HOST_x86_64_unknown_linux_gnu=1
 export NIX_CC_WRAPPER_TARGET_HOST_x86_64_unknown_linux_gnu
-NIX_CFLAGS_COMPILE=' -frandom-seed=w4hwpczf7x -isystem /nix/store/gkqv9ia81dmmjqcn46ih5yirbzjy7s9p-SDL2-2.0.14-dev/include -isystem /nix/store/5sphs39wg8gyy5pcrcml5pyj1wrn9jil-libGL-1.3.2-dev/include -isystem /nix/store/skwk7hmzwpjvhgjf1y633l01p114xc6n-libglvnd-1.3.2-dev/include -isystem /nix/store/3y6j0k82fdp3ifnq655yv1ad1ih7r70j-libX11-1.7.0-dev/include -isystem /nix/store/vjimy2jlifszmmms664373jdw0yiz4ln-xorgproto-2020.1/include -isystem /nix/store/6xg7mhwh2k7i27r44lx679diwd7ahq6d-libxcb-1.14-dev/include -isystem /nix/store/qx325fjgyhy5cql0fkbkzzbi9dpd2cb8-SDL2_ttf-2.0.15/include -isystem /nix/store/gkqv9ia81dmmjqcn46ih5yirbzjy7s9p-SDL2-2.0.14-dev/include -isystem /nix/store/5sphs39wg8gyy5pcrcml5pyj1wrn9jil-libGL-1.3.2-dev/include -isystem /nix/store/skwk7hmzwpjvhgjf1y633l01p114xc6n-libglvnd-1.3.2-dev/include -isystem /nix/store/3y6j0k82fdp3ifnq655yv1ad1ih7r70j-libX11-1.7.0-dev/include -isystem /nix/store/vjimy2jlifszmmms664373jdw0yiz4ln-xorgproto-2020.1/include -isystem /nix/store/6xg7mhwh2k7i27r44lx679diwd7ahq6d-libxcb-1.14-dev/include -isystem /nix/store/qx325fjgyhy5cql0fkbkzzbi9dpd2cb8-SDL2_ttf-2.0.15/include'
+NIX_CFLAGS_COMPILE=' -frandom-seed=yq21786917 -isystem /nix/store/gkqv9ia81dmmjqcn46ih5yirbzjy7s9p-SDL2-2.0.14-dev/include -isystem /nix/store/5sphs39wg8gyy5pcrcml5pyj1wrn9jil-libGL-1.3.2-dev/include -isystem /nix/store/skwk7hmzwpjvhgjf1y633l01p114xc6n-libglvnd-1.3.2-dev/include -isystem /nix/store/3y6j0k82fdp3ifnq655yv1ad1ih7r70j-libX11-1.7.0-dev/include -isystem /nix/store/vjimy2jlifszmmms664373jdw0yiz4ln-xorgproto-2020.1/include -isystem /nix/store/6xg7mhwh2k7i27r44lx679diwd7ahq6d-libxcb-1.14-dev/include -isystem /nix/store/qx325fjgyhy5cql0fkbkzzbi9dpd2cb8-SDL2_ttf-2.0.15/include -isystem /nix/store/gkqv9ia81dmmjqcn46ih5yirbzjy7s9p-SDL2-2.0.14-dev/include -isystem /nix/store/5sphs39wg8gyy5pcrcml5pyj1wrn9jil-libGL-1.3.2-dev/include -isystem /nix/store/skwk7hmzwpjvhgjf1y633l01p114xc6n-libglvnd-1.3.2-dev/include -isystem /nix/store/3y6j0k82fdp3ifnq655yv1ad1ih7r70j-libX11-1.7.0-dev/include -isystem /nix/store/vjimy2jlifszmmms664373jdw0yiz4ln-xorgproto-2020.1/include -isystem /nix/store/6xg7mhwh2k7i27r44lx679diwd7ahq6d-libxcb-1.14-dev/include -isystem /nix/store/qx325fjgyhy5cql0fkbkzzbi9dpd2cb8-SDL2_ttf-2.0.15/include'
 export NIX_CFLAGS_COMPILE
 NIX_ENFORCE_NO_NATIVE=1
 export NIX_ENFORCE_NO_NATIVE
@@ -55,7 +55,7 @@ export OBJDUMP
 OPTERR=1
 OPTIND=1
 OSTYPE=linux-gnu
-PATH=/nix/store/gkqv9ia81dmmjqcn46ih5yirbzjy7s9p-SDL2-2.0.14-dev/bin:/nix/store/dqrvwdcqz93xcvazd19hi6w06n4l9bq1-rust-1.53.0-nightly-2021-03-30-74874a690/bin:/nix/store/hpkjc41idlbwk82cnx0sw8mmkjjb5lvi-rust-analyzer-unstable-2021-03-01/bin:/nix/store/405d8m4m7k30n71sjrjl1kyysd2y9r62-rustfmt-1.49.0/bin:/nix/store/2h05zs2wbxv3zisz342k6acfm6awcnwl-cargo-1.49.0/bin:/nix/store/zrh1cskgv6kc8bh7hzfii14h2nck33qv-patchelf-0.12/bin:/nix/store/ca37d3qrydh0wpw40kswsx30j8dyzxh2-gcc-wrapper-10.2.0/bin:/nix/store/sr0ci8f8pgby77fj4mpcl9bcgxji3676-gcc-10.2.0/bin:/nix/store/mbxi7rhg9pj2mfnzr7dk9cd46xdhnrf9-glibc-2.32-37-bin/bin:/nix/store/w21pgi6691202iafl0cnr7hk6wvvdz3n-coreutils-8.32/bin:/nix/store/jlyaypckqlapwqpck7jscs6qcdwg9bk3-binutils-wrapper-2.35.1/bin:/nix/store/cp1sa3xxvl71cypiinw2c62i5s33chlr-binutils-2.35.1/bin:/nix/store/mbxi7rhg9pj2mfnzr7dk9cd46xdhnrf9-glibc-2.32-37-bin/bin:/nix/store/w21pgi6691202iafl0cnr7hk6wvvdz3n-coreutils-8.32/bin:/nix/store/w21pgi6691202iafl0cnr7hk6wvvdz3n-coreutils-8.32/bin:/nix/store/70qfzyc5hmvssj7d0dqkqhn827xwgmy3-findutils-4.7.0/bin:/nix/store/49gllxpk2f3dcyx4q8cgj0w39p10s209-diffutils-3.7/bin:/nix/store/n0516fv7vwjbl41nl4q58w9si80ab93i-gnused-4.8/bin:/nix/store/3mx947xcmsyk79izqc8ifv31qafp80pc-gnugrep-3.6/bin:/nix/store/xj242al7hq36baipvj2qdfwf7dljq31f-gawk-5.1.0/bin:/nix/store/39qygzkhcb9i684w3fhr2kkz5gmcyycd-gnutar-1.32/bin:/nix/store/bnpadh78k2qf3hshwapl5s51dj87yykp-gzip-1.10/bin:/nix/store/k514dbajcp0wb32rnglvc940gldj549h-bzip2-1.0.6.0.1-bin/bin:/nix/store/a2q8136fwwkvigxq3icyd70zllvw45lc-gnumake-4.3/bin:/nix/store/f7jzmxq9bpbxsg69cszx56mw14n115n5-bash-4.4-p23/bin:/nix/store/kh9l9zpjxsdnx6zi91pk3yich8ivwii4-patch-2.7.6/bin:/nix/store/bap20qjfwfzl49zz11prqdyfdmq7w8ca-xz-5.2.5-bin/bin
+PATH=/nix/store/gkqv9ia81dmmjqcn46ih5yirbzjy7s9p-SDL2-2.0.14-dev/bin:/nix/store/dqrvwdcqz93xcvazd19hi6w06n4l9bq1-rust-1.53.0-nightly-2021-03-30-74874a690/bin:/nix/store/hpkjc41idlbwk82cnx0sw8mmkjjb5lvi-rust-analyzer-unstable-2021-03-01/bin:/nix/store/405d8m4m7k30n71sjrjl1kyysd2y9r62-rustfmt-1.49.0/bin:/nix/store/2h05zs2wbxv3zisz342k6acfm6awcnwl-cargo-1.49.0/bin:/nix/store/4phc9r09f1nd8sm7ydwi2wkspk5ippl5-cargo-watch-7.5.0/bin:/nix/store/zrh1cskgv6kc8bh7hzfii14h2nck33qv-patchelf-0.12/bin:/nix/store/ca37d3qrydh0wpw40kswsx30j8dyzxh2-gcc-wrapper-10.2.0/bin:/nix/store/sr0ci8f8pgby77fj4mpcl9bcgxji3676-gcc-10.2.0/bin:/nix/store/mbxi7rhg9pj2mfnzr7dk9cd46xdhnrf9-glibc-2.32-37-bin/bin:/nix/store/w21pgi6691202iafl0cnr7hk6wvvdz3n-coreutils-8.32/bin:/nix/store/jlyaypckqlapwqpck7jscs6qcdwg9bk3-binutils-wrapper-2.35.1/bin:/nix/store/cp1sa3xxvl71cypiinw2c62i5s33chlr-binutils-2.35.1/bin:/nix/store/mbxi7rhg9pj2mfnzr7dk9cd46xdhnrf9-glibc-2.32-37-bin/bin:/nix/store/w21pgi6691202iafl0cnr7hk6wvvdz3n-coreutils-8.32/bin:/nix/store/w21pgi6691202iafl0cnr7hk6wvvdz3n-coreutils-8.32/bin:/nix/store/70qfzyc5hmvssj7d0dqkqhn827xwgmy3-findutils-4.7.0/bin:/nix/store/49gllxpk2f3dcyx4q8cgj0w39p10s209-diffutils-3.7/bin:/nix/store/n0516fv7vwjbl41nl4q58w9si80ab93i-gnused-4.8/bin:/nix/store/3mx947xcmsyk79izqc8ifv31qafp80pc-gnugrep-3.6/bin:/nix/store/xj242al7hq36baipvj2qdfwf7dljq31f-gawk-5.1.0/bin:/nix/store/39qygzkhcb9i684w3fhr2kkz5gmcyycd-gnutar-1.32/bin:/nix/store/bnpadh78k2qf3hshwapl5s51dj87yykp-gzip-1.10/bin:/nix/store/k514dbajcp0wb32rnglvc940gldj549h-bzip2-1.0.6.0.1-bin/bin:/nix/store/a2q8136fwwkvigxq3icyd70zllvw45lc-gnumake-4.3/bin:/nix/store/f7jzmxq9bpbxsg69cszx56mw14n115n5-bash-4.4-p23/bin:/nix/store/kh9l9zpjxsdnx6zi91pk3yich8ivwii4-patch-2.7.6/bin:/nix/store/bap20qjfwfzl49zz11prqdyfdmq7w8ca-xz-5.2.5-bin/bin
 export PATH
 PIPESTATUS=([0]="0")
 PS4='+ '
@@ -124,7 +124,7 @@ fixupOutputHooks=([0]="if [ -z \"\${dontPatchELF-}\" ]; then patchELF \"\$prefix
 initialPath='/nix/store/w21pgi6691202iafl0cnr7hk6wvvdz3n-coreutils-8.32 /nix/store/70qfzyc5hmvssj7d0dqkqhn827xwgmy3-findutils-4.7.0 /nix/store/49gllxpk2f3dcyx4q8cgj0w39p10s209-diffutils-3.7 /nix/store/n0516fv7vwjbl41nl4q58w9si80ab93i-gnused-4.8 /nix/store/3mx947xcmsyk79izqc8ifv31qafp80pc-gnugrep-3.6 /nix/store/xj242al7hq36baipvj2qdfwf7dljq31f-gawk-5.1.0 /nix/store/39qygzkhcb9i684w3fhr2kkz5gmcyycd-gnutar-1.32 /nix/store/bnpadh78k2qf3hshwapl5s51dj87yykp-gzip-1.10 /nix/store/k514dbajcp0wb32rnglvc940gldj549h-bzip2-1.0.6.0.1-bin /nix/store/a2q8136fwwkvigxq3icyd70zllvw45lc-gnumake-4.3 /nix/store/f7jzmxq9bpbxsg69cszx56mw14n115n5-bash-4.4-p23 /nix/store/kh9l9zpjxsdnx6zi91pk3yich8ivwii4-patch-2.7.6 /nix/store/bap20qjfwfzl49zz11prqdyfdmq7w8ca-xz-5.2.5-bin'
 name=nix-shell
 export name
-nativeBuildInputs='/nix/store/gkqv9ia81dmmjqcn46ih5yirbzjy7s9p-SDL2-2.0.14-dev /nix/store/qx325fjgyhy5cql0fkbkzzbi9dpd2cb8-SDL2_ttf-2.0.15 /nix/store/dqrvwdcqz93xcvazd19hi6w06n4l9bq1-rust-1.53.0-nightly-2021-03-30-74874a690 /nix/store/znf8wv5xxzrbq7jq0bxmjxsimgnbxnn8-rust-src-1.53.0-nightly-2021-03-30-74874a690 /nix/store/hpkjc41idlbwk82cnx0sw8mmkjjb5lvi-rust-analyzer-unstable-2021-03-01 /nix/store/405d8m4m7k30n71sjrjl1kyysd2y9r62-rustfmt-1.49.0 /nix/store/2h05zs2wbxv3zisz342k6acfm6awcnwl-cargo-1.49.0'
+nativeBuildInputs='/nix/store/gkqv9ia81dmmjqcn46ih5yirbzjy7s9p-SDL2-2.0.14-dev /nix/store/qx325fjgyhy5cql0fkbkzzbi9dpd2cb8-SDL2_ttf-2.0.15 /nix/store/dqrvwdcqz93xcvazd19hi6w06n4l9bq1-rust-1.53.0-nightly-2021-03-30-74874a690 /nix/store/znf8wv5xxzrbq7jq0bxmjxsimgnbxnn8-rust-src-1.53.0-nightly-2021-03-30-74874a690 /nix/store/hpkjc41idlbwk82cnx0sw8mmkjjb5lvi-rust-analyzer-unstable-2021-03-01 /nix/store/405d8m4m7k30n71sjrjl1kyysd2y9r62-rustfmt-1.49.0 /nix/store/2h05zs2wbxv3zisz342k6acfm6awcnwl-cargo-1.49.0 /nix/store/4phc9r09f1nd8sm7ydwi2wkspk5ippl5-cargo-watch-7.5.0'
 export nativeBuildInputs
 nobuildPhase=$'echo\necho "This derivation is not meant to be built, aborting";\necho\nexit 1\n'
 export nobuildPhase
@@ -146,7 +146,7 @@ export patches
 phases=nobuildPhase
 export phases
 pkg=/nix/store/ca37d3qrydh0wpw40kswsx30j8dyzxh2-gcc-wrapper-10.2.0
-pkgsBuildHost=([0]="/nix/store/gkqv9ia81dmmjqcn46ih5yirbzjy7s9p-SDL2-2.0.14-dev" [1]="/nix/store/5sphs39wg8gyy5pcrcml5pyj1wrn9jil-libGL-1.3.2-dev" [2]="/nix/store/q47zvd16rpppdz4ami7wrx8318fwjpfk-libGL-1.3.2" [3]="/nix/store/sv2xsv21136linyi477ijd00gmihlwbp-libglvnd-1.3.2" [4]="/nix/store/skwk7hmzwpjvhgjf1y633l01p114xc6n-libglvnd-1.3.2-dev" [5]="/nix/store/3y6j0k82fdp3ifnq655yv1ad1ih7r70j-libX11-1.7.0-dev" [6]="/nix/store/vjimy2jlifszmmms664373jdw0yiz4ln-xorgproto-2020.1" [7]="/nix/store/6xg7mhwh2k7i27r44lx679diwd7ahq6d-libxcb-1.14-dev" [8]="/nix/store/jmpwz53zajcld1xb8zslh8g8p19d8wzl-libxcb-1.14" [9]="/nix/store/80p7f1sw4szy7w1mhqxd268n6i1gmybs-libX11-1.7.0" [10]="/nix/store/k58g6biziz8vpk6zw5n9bym2c6wxjrpd-SDL2-2.0.14" [11]="/nix/store/qx325fjgyhy5cql0fkbkzzbi9dpd2cb8-SDL2_ttf-2.0.15" [12]="/nix/store/dqrvwdcqz93xcvazd19hi6w06n4l9bq1-rust-1.53.0-nightly-2021-03-30-74874a690" [13]="/nix/store/znf8wv5xxzrbq7jq0bxmjxsimgnbxnn8-rust-src-1.53.0-nightly-2021-03-30-74874a690" [14]="/nix/store/hpkjc41idlbwk82cnx0sw8mmkjjb5lvi-rust-analyzer-unstable-2021-03-01" [15]="/nix/store/405d8m4m7k30n71sjrjl1kyysd2y9r62-rustfmt-1.49.0" [16]="/nix/store/2h05zs2wbxv3zisz342k6acfm6awcnwl-cargo-1.49.0" [17]="/nix/store/zrh1cskgv6kc8bh7hzfii14h2nck33qv-patchelf-0.12" [18]="/nix/store/mjjy30kxz775bhhi6j9phw81qh6dsbrf-move-docs.sh" [19]="/nix/store/kxw6q8v6isaqjm702d71n2421cxamq68-make-symlinks-relative.sh" [20]="/nix/store/cl3qd985p1yxyfkj96v0hqxiy3w69xq5-compress-man-pages.sh" [21]="/nix/store/h54dzwd7rdh2jlcv91424csl6d0ccgjy-strip.sh" [22]="/nix/store/bnj8d7mvbkg3vdb07yz74yhl3g107qq5-patch-shebangs.sh" [23]="/nix/store/cickvswrvann041nqxb0rxilc46svw1n-prune-libtool-files.sh" [24]="/nix/store/8zxndz5ag0p6s526c2xyllhk1nrn4c3i-audit-tmpdir.sh" [25]="/nix/store/c8n9kcdddp9np665xz6ri61b383nxvz8-move-systemd-user-units.sh" [26]="/nix/store/1i5y55x4b4m9qkx5dqbmr1r6bvrqbanw-multiple-outputs.sh" [27]="/nix/store/kd4xwxjpjxi71jkm6ka0np72if9rm3y0-move-sbin.sh" [28]="/nix/store/fyaryjvghbkpfnsyw97hb3lyb37s1pd6-move-lib64.sh" [29]="/nix/store/ngg1cv31c8c7bcm2n8ww4g06nq7s4zhm-set-source-date-epoch-to-latest.sh" [30]="/nix/store/pr6nzbscdpg94yvr151lrif2kg0csx7b-reproducible-builds.sh" [31]="/nix/store/ca37d3qrydh0wpw40kswsx30j8dyzxh2-gcc-wrapper-10.2.0" [32]="/nix/store/jlyaypckqlapwqpck7jscs6qcdwg9bk3-binutils-wrapper-2.35.1")
+pkgsBuildHost=([0]="/nix/store/gkqv9ia81dmmjqcn46ih5yirbzjy7s9p-SDL2-2.0.14-dev" [1]="/nix/store/5sphs39wg8gyy5pcrcml5pyj1wrn9jil-libGL-1.3.2-dev" [2]="/nix/store/q47zvd16rpppdz4ami7wrx8318fwjpfk-libGL-1.3.2" [3]="/nix/store/sv2xsv21136linyi477ijd00gmihlwbp-libglvnd-1.3.2" [4]="/nix/store/skwk7hmzwpjvhgjf1y633l01p114xc6n-libglvnd-1.3.2-dev" [5]="/nix/store/3y6j0k82fdp3ifnq655yv1ad1ih7r70j-libX11-1.7.0-dev" [6]="/nix/store/vjimy2jlifszmmms664373jdw0yiz4ln-xorgproto-2020.1" [7]="/nix/store/6xg7mhwh2k7i27r44lx679diwd7ahq6d-libxcb-1.14-dev" [8]="/nix/store/jmpwz53zajcld1xb8zslh8g8p19d8wzl-libxcb-1.14" [9]="/nix/store/80p7f1sw4szy7w1mhqxd268n6i1gmybs-libX11-1.7.0" [10]="/nix/store/k58g6biziz8vpk6zw5n9bym2c6wxjrpd-SDL2-2.0.14" [11]="/nix/store/qx325fjgyhy5cql0fkbkzzbi9dpd2cb8-SDL2_ttf-2.0.15" [12]="/nix/store/dqrvwdcqz93xcvazd19hi6w06n4l9bq1-rust-1.53.0-nightly-2021-03-30-74874a690" [13]="/nix/store/znf8wv5xxzrbq7jq0bxmjxsimgnbxnn8-rust-src-1.53.0-nightly-2021-03-30-74874a690" [14]="/nix/store/hpkjc41idlbwk82cnx0sw8mmkjjb5lvi-rust-analyzer-unstable-2021-03-01" [15]="/nix/store/405d8m4m7k30n71sjrjl1kyysd2y9r62-rustfmt-1.49.0" [16]="/nix/store/2h05zs2wbxv3zisz342k6acfm6awcnwl-cargo-1.49.0" [17]="/nix/store/4phc9r09f1nd8sm7ydwi2wkspk5ippl5-cargo-watch-7.5.0" [18]="/nix/store/zrh1cskgv6kc8bh7hzfii14h2nck33qv-patchelf-0.12" [19]="/nix/store/mjjy30kxz775bhhi6j9phw81qh6dsbrf-move-docs.sh" [20]="/nix/store/kxw6q8v6isaqjm702d71n2421cxamq68-make-symlinks-relative.sh" [21]="/nix/store/cl3qd985p1yxyfkj96v0hqxiy3w69xq5-compress-man-pages.sh" [22]="/nix/store/h54dzwd7rdh2jlcv91424csl6d0ccgjy-strip.sh" [23]="/nix/store/bnj8d7mvbkg3vdb07yz74yhl3g107qq5-patch-shebangs.sh" [24]="/nix/store/cickvswrvann041nqxb0rxilc46svw1n-prune-libtool-files.sh" [25]="/nix/store/8zxndz5ag0p6s526c2xyllhk1nrn4c3i-audit-tmpdir.sh" [26]="/nix/store/c8n9kcdddp9np665xz6ri61b383nxvz8-move-systemd-user-units.sh" [27]="/nix/store/1i5y55x4b4m9qkx5dqbmr1r6bvrqbanw-multiple-outputs.sh" [28]="/nix/store/kd4xwxjpjxi71jkm6ka0np72if9rm3y0-move-sbin.sh" [29]="/nix/store/fyaryjvghbkpfnsyw97hb3lyb37s1pd6-move-lib64.sh" [30]="/nix/store/ngg1cv31c8c7bcm2n8ww4g06nq7s4zhm-set-source-date-epoch-to-latest.sh" [31]="/nix/store/pr6nzbscdpg94yvr151lrif2kg0csx7b-reproducible-builds.sh" [32]="/nix/store/ca37d3qrydh0wpw40kswsx30j8dyzxh2-gcc-wrapper-10.2.0" [33]="/nix/store/jlyaypckqlapwqpck7jscs6qcdwg9bk3-binutils-wrapper-2.35.1")
 postFixupHooks=([0]="_multioutPropagateDev")
 postUnpackHooks=([0]="_updateSourceDateEpochFromSourceRoot")
 preConfigureHooks=([0]="_multioutConfig")
diff --git a/flake.nix b/flake.nix
index 2acc1f3..a3e458f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -64,6 +64,7 @@
             pkgs.rust-analyzer
             pkgs.rustfmt
             pkgs.cargo
+            pkgs.cargo-watch
           ];
           RUST_SRC_PATH = "${rust-src}/lib/rustlib/src/rust/library";
           RUST_LOG = "info";