CI: install Pipfile into system interpreter

A virtual environment is redundant in the context of deployment. It
just increases the size and build time of the image.

* Replace venv with system interpreter
* Mount Python binaries in /usr/local/bin in NsJail
* Fix #61: Python symlink in venv not resolving
* Re-lock Pipfile because it wasn't up to date according to
  pipenv install --deploy

4 files changed, 186 insertions, 141 deletions

diff --git a/Pipfile.lock b/Pipfile.lock
index 578aec1..04765b6 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "abd28ace3bcd59d9ec30c2b4bf9c1b1598f54f33d75e08bb0179fe985946dad5"
+            "sha256": "4a760f24a649010040635541114b17cadfd785956cfd9216a6f8c9590a69cca1"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -18,11 +18,11 @@
     "default": {
         "arrow": {
             "hashes": [
-                "sha256:01a16d8a93eddf86a29237f32ae36b29c27f047e79312eb4df5d55fd5a2b3183",
-                "sha256:e1a318a4c0b787833ae46302c02488b6eeef413c6a13324b3261ad320f21ec1e"
+                "sha256:5390e464e2c5f76971b60ffa7ee29c598c7501a294bc9f5e6dadcb251a5d027b",
+                "sha256:70729bcc831da496ca3cb4b7e89472c8e2d27d398908155e0796179f6d2d41ee"
             ],
             "index": "pypi",
-            "version": "==0.15.4"
+            "version": "==0.15.5"
         },
         "attrs": {
             "hashes": [
@@ -34,12 +34,12 @@
         },
         "beautifulsoup4": {
             "hashes": [
-                "sha256:5279c36b4b2ec2cb4298d723791467e3000e5384a43ea0cdf5d45207c7e97169",
-                "sha256:6135db2ba678168c07950f9a16c4031822c6f4aec75a65e0a97bc5ca09789931",
-                "sha256:dcdef580e18a76d54002088602eba453eec38ebbcafafeaabd8cab12b6155d57"
+                "sha256:05fd825eb01c290877657a56df4c6e4c311b3965bda790c613a3d6fb01a5462a",
+                "sha256:9fbb4d6e48ecd30bcacc5b63b94088192dcda178513b2ae3c394229f8911b887",
+                "sha256:e1505eeed31b0f4ce2dbb3bc8eb256c04cc2b3b72af7d551a4ab6efd5cbe5dae"
             ],
             "index": "pypi",
-            "version": "==4.8.1"
+            "version": "==4.8.2"
         },
         "decorator": {
             "hashes": [
@@ -77,11 +77,11 @@
         },
         "fuzzywuzzy": {
             "hashes": [
-                "sha256:5ac7c0b3f4658d2743aa17da53a55598144edbc5bee3c6863840636e6926f254",
-                "sha256:6f49de47db00e1c71d40ad16da42284ac357936fa9b66bea1df63fed07122d62"
+                "sha256:45016e92264780e58972dca1b3d939ac864b78437422beecebb3095f8efd00e8",
+                "sha256:928244b28db720d1e0ee7587acf660ea49d7e4c632569cad4f1cd7e68a5f0993"
             ],
             "index": "pypi",
-            "version": "==0.17.0"
+            "version": "==0.18.0"
         },
         "gunicorn": {
             "hashes": [
@@ -93,10 +93,10 @@
         },
         "idna": {
             "hashes": [
-                "sha256:c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407",
-                "sha256:ea8b7f6188e6fa117537c3df7da9fc686d485087abf6ac197f9c46432f7e4a3c"
+                "sha256:7588d1c14ae4c77d74036e8c22ff447b26d0fde8f007354fd48a7814db15b7cb",
+                "sha256:a068a21ceac8a4d63dbfd964670474107f541babbd2250d61922f029858365fa"
             ],
-            "version": "==2.8"
+            "version": "==2.9"
         },
         "jsonschema": {
             "hashes": [
@@ -108,11 +108,11 @@
         },
         "more-itertools": {
             "hashes": [
-                "sha256:b84b238cce0d9adad5ed87e745778d20a3f8487d0f0cb8b8a586816c7496458d",
-                "sha256:c833ef592a0324bcc6a60e48440da07645063c453880c9477ceb22490aec1564"
+                "sha256:5dd8bcf33e5f9513ffa06d5ad33d78f31e1931ac9a18f33d37e77a180d393a7c",
+                "sha256:b1ddb932186d8a6ac451e1d95844b382f55e12686d51ca0c68b6f61f2ab7a507"
             ],
             "index": "pypi",
-            "version": "==8.0.2"
+            "version": "==8.2.0"
         },
         "mpmath": {
             "hashes": [
@@ -122,25 +122,25 @@
         },
         "multidict": {
             "hashes": [
-                "sha256:09c19f642e055550c9319d5123221b7e07fc79bda58122aa93910e52f2ab2f29",
-                "sha256:0c1a5d5f7aa7189f7b83c4411c2af8f1d38d69c4360d5de3eea129c65d8d7ce2",
-                "sha256:12f22980e7ed0972a969520fb1e55682c9fca89a68b21b49ec43132e680be812",
-                "sha256:258660e9d6b52de1a75097944e12718d3aa59adc611b703361e3577d69167aaf",
-                "sha256:3374a23e707848f27b3438500db0c69eca82929337656fce556bd70031fbda74",
-                "sha256:503b7fce0054c73aa631cc910a470052df33d599f3401f3b77e54d31182525d5",
-                "sha256:6ce55f2c45ffc90239aab625bb1b4864eef33f73ea88487ef968291fbf09fb3f",
-                "sha256:725496dde5730f4ad0a627e1a58e2620c1bde0ad1c8080aae15d583eb23344ce",
-                "sha256:a3721078beff247d0cd4fb19d915c2c25f90907cf8d6cd49d0413a24915577c6",
-                "sha256:ba566518550f81daca649eded8b5c7dd09210a854637c82351410aa15c49324a",
-                "sha256:c42362750a51a15dc905cb891658f822ee5021bfbea898c03aa1ed833e2248a5",
-                "sha256:cf14aaf2ab067ca10bca0b14d5cbd751dd249e65d371734bc0e47ddd8fafc175",
-                "sha256:cf24e15986762f0e75a622eb19cfe39a042e952b8afba3e7408835b9af2be4fb",
-                "sha256:d7b6da08538302c5245cd3103f333655ba7f274915f1f5121c4f4b5fbdb3febe",
-                "sha256:e27e13b9ff0a914a6b8fb7e4947d4ac6be8e4f61ede17edffabd088817df9e26",
-                "sha256:e53b205f8afd76fc6c942ef39e8ee7c519c775d336291d32874082a87802c67c",
-                "sha256:ec804fc5f68695d91c24d716020278fcffd50890492690a7e1fef2e741f7172c"
-            ],
-            "version": "==4.7.1"
+                "sha256:317f96bc0950d249e96d8d29ab556d01dd38888fbe68324f46fd834b430169f1",
+                "sha256:42f56542166040b4474c0c608ed051732033cd821126493cf25b6c276df7dd35",
+                "sha256:4b7df040fb5fe826d689204f9b544af469593fb3ff3a069a6ad3409f742f5928",
+                "sha256:544fae9261232a97102e27a926019100a9db75bec7b37feedd74b3aa82f29969",
+                "sha256:620b37c3fea181dab09267cd5a84b0f23fa043beb8bc50d8474dd9694de1fa6e",
+                "sha256:6e6fef114741c4d7ca46da8449038ec8b1e880bbe68674c01ceeb1ac8a648e78",
+                "sha256:7774e9f6c9af3f12f296131453f7b81dabb7ebdb948483362f5afcaac8a826f1",
+                "sha256:85cb26c38c96f76b7ff38b86c9d560dea10cf3459bb5f4caf72fc1bb932c7136",
+                "sha256:a326f4240123a2ac66bb163eeba99578e9d63a8654a59f4688a79198f9aa10f8",
+                "sha256:ae402f43604e3b2bc41e8ea8b8526c7fa7139ed76b0d64fc48e28125925275b2",
+                "sha256:aee283c49601fa4c13adc64c09c978838a7e812f85377ae130a24d7198c0331e",
+                "sha256:b51249fdd2923739cd3efc95a3d6c363b67bbf779208e9f37fd5e68540d1a4d4",
+                "sha256:bb519becc46275c594410c6c28a8a0adc66fe24fef154a9addea54c1adb006f5",
+                "sha256:c2c37185fb0af79d5c117b8d2764f4321eeb12ba8c141a95d0aa8c2c1d0a11dd",
+                "sha256:dc561313279f9d05a3d0ffa89cd15ae477528ea37aa9795c4654588a3287a9ab",
+                "sha256:e439c9a10a95cb32abd708bb8be83b2134fa93790a4fb0535ca36db3dda94d20",
+                "sha256:fc3b4adc2ee8474cb3cd2a155305d5f8eda0a9c91320f83e55748e1fcb68f8e3"
+            ],
+            "version": "==4.7.5"
         },
         "networkx": {
             "hashes": [
@@ -152,30 +152,30 @@
         },
         "numpy": {
             "hashes": [
-                "sha256:0a7a1dd123aecc9f0076934288ceed7fd9a81ba3919f11a855a7887cbe82a02f",
-                "sha256:0c0763787133dfeec19904c22c7e358b231c87ba3206b211652f8cbe1241deb6",
-                "sha256:3d52298d0be333583739f1aec9026f3b09fdfe3ddf7c7028cb16d9d2af1cca7e",
-                "sha256:43bb4b70585f1c2d153e45323a886839f98af8bfa810f7014b20be714c37c447",
-                "sha256:475963c5b9e116c38ad7347e154e5651d05a2286d86455671f5b1eebba5feb76",
-                "sha256:64874913367f18eb3013b16123c9fed113962e75d809fca5b78ebfbb73ed93ba",
-                "sha256:683828e50c339fc9e68720396f2de14253992c495fdddef77a1e17de55f1decc",
-                "sha256:6ca4000c4a6f95a78c33c7dadbb9495c10880be9c89316aa536eac359ab820ae",
-                "sha256:75fd817b7061f6378e4659dd792c84c0b60533e867f83e0d1e52d5d8e53df88c",
-                "sha256:7d81d784bdbed30137aca242ab307f3e65c8d93f4c7b7d8f322110b2e90177f9",
-                "sha256:8d0af8d3664f142414fd5b15cabfd3b6cc3ef242a3c7a7493257025be5a6955f",
-                "sha256:9679831005fb16c6df3dd35d17aa31dc0d4d7573d84f0b44cc481490a65c7725",
-                "sha256:a8f67ebfae9f575d85fa859b54d3bdecaeece74e3274b0b5c5f804d7ca789fe1",
-                "sha256:acbf5c52db4adb366c064d0b7c7899e3e778d89db585feadd23b06b587d64761",
-                "sha256:ada4805ed51f5bcaa3a06d3dd94939351869c095e30a2b54264f5a5004b52170",
-                "sha256:c7354e8f0eca5c110b7e978034cd86ed98a7a5ffcf69ca97535445a595e07b8e",
-                "sha256:e2e9d8c87120ba2c591f60e32736b82b67f72c37ba88a4c23c81b5b8fa49c018",
-                "sha256:e467c57121fe1b78a8f68dd9255fbb3bb3f4f7547c6b9e109f31d14569f490c3",
-                "sha256:ede47b98de79565fcd7f2decb475e2dcc85ee4097743e551fe26cfc7eb3ff143",
-                "sha256:f58913e9227400f1395c7b800503ebfdb0772f1c33ff8cb4d6451c06cabdf316",
-                "sha256:fe39f5fd4103ec4ca3cb8600b19216cd1ff316b4990f4c0b6057ad982c0a34d5"
-            ],
-            "index": "pypi",
-            "version": "==1.17.4"
+                "sha256:1786a08236f2c92ae0e70423c45e1e62788ed33028f94ca99c4df03f5be6b3c6",
+                "sha256:17aa7a81fe7599a10f2b7d95856dc5cf84a4eefa45bc96123cbbc3ebc568994e",
+                "sha256:20b26aaa5b3da029942cdcce719b363dbe58696ad182aff0e5dcb1687ec946dc",
+                "sha256:2d75908ab3ced4223ccba595b48e538afa5ecc37405923d1fea6906d7c3a50bc",
+                "sha256:39d2c685af15d3ce682c99ce5925cc66efc824652e10990d2462dfe9b8918c6a",
+                "sha256:56bc8ded6fcd9adea90f65377438f9fea8c05fcf7c5ba766bef258d0da1554aa",
+                "sha256:590355aeade1a2eaba17617c19edccb7db8d78760175256e3cf94590a1a964f3",
+                "sha256:70a840a26f4e61defa7bdf811d7498a284ced303dfbc35acb7be12a39b2aa121",
+                "sha256:77c3bfe65d8560487052ad55c6998a04b654c2fbc36d546aef2b2e511e760971",
+                "sha256:9537eecf179f566fd1c160a2e912ca0b8e02d773af0a7a1120ad4f7507cd0d26",
+                "sha256:9acdf933c1fd263c513a2df3dceecea6f3ff4419d80bf238510976bf9bcb26cd",
+                "sha256:ae0975f42ab1f28364dcda3dde3cf6c1ddab3e1d4b2909da0cb0191fa9ca0480",
+                "sha256:b3af02ecc999c8003e538e60c89a2b37646b39b688d4e44d7373e11c2debabec",
+                "sha256:b6ff59cee96b454516e47e7721098e6ceebef435e3e21ac2d6c3b8b02628eb77",
+                "sha256:b765ed3930b92812aa698a455847141869ef755a87e099fddd4ccf9d81fffb57",
+                "sha256:c98c5ffd7d41611407a1103ae11c8b634ad6a43606eca3e2a5a269e5d6e8eb07",
+                "sha256:cf7eb6b1025d3e169989416b1adcd676624c2dbed9e3bcb7137f51bfc8cc2572",
+                "sha256:d92350c22b150c1cae7ebb0ee8b5670cc84848f6359cf6b5d8f86617098a9b73",
+                "sha256:e422c3152921cece8b6a2fb6b0b4d73b6579bd20ae075e7d15143e711f3ca2ca",
+                "sha256:e840f552a509e3380b0f0ec977e8124d0dc34dc0e68289ca28f4d7c1d0d79474",
+                "sha256:f3d0a94ad151870978fb93538e95411c83899c9dc63e6fb65542f769568ecfa5"
+            ],
+            "index": "pypi",
+            "version": "==1.18.1"
         },
         "pandas": {
             "hashes": [
@@ -216,9 +216,9 @@
         },
         "pyrsistent": {
             "hashes": [
-                "sha256:f3b280d030afb652f79d67c5586157c5c1355c9a58dfc7940566e28d28f3df1b"
+                "sha256:cdc7b5e3ed77bed61270a47d35434a30617b9becdf2478af76ad2c6ade307280"
             ],
-            "version": "==0.15.6"
+            "version": "==0.15.7"
         },
         "python-dateutil": {
             "hashes": [
@@ -244,54 +244,54 @@
         },
         "pyyaml": {
             "hashes": [
-                "sha256:0e7f69397d53155e55d10ff68fdfb2cf630a35e6daf65cf0bdeaf04f127c09dc",
-                "sha256:2e9f0b7c5914367b0916c3c104a024bb68f269a486b9d04a2e8ac6f6597b7803",
-                "sha256:35ace9b4147848cafac3db142795ee42deebe9d0dad885ce643928e88daebdcc",
-                "sha256:38a4f0d114101c58c0f3a88aeaa44d63efd588845c5a2df5290b73db8f246d15",
-                "sha256:483eb6a33b671408c8529106df3707270bfacb2447bf8ad856a4b4f57f6e3075",
-                "sha256:4b6be5edb9f6bb73680f5bf4ee08ff25416d1400fbd4535fe0069b2994da07cd",
-                "sha256:7f38e35c00e160db592091751d385cd7b3046d6d51f578b29943225178257b31",
-                "sha256:8100c896ecb361794d8bfdb9c11fce618c7cf83d624d73d5ab38aef3bc82d43f",
-                "sha256:c0ee8eca2c582d29c3c2ec6e2c4f703d1b7f1fb10bc72317355a746057e7346c",
-                "sha256:e4c015484ff0ff197564917b4b4246ca03f411b9bd7f16e02a2f586eb48b6d04",
-                "sha256:ebc4ed52dcc93eeebeae5cf5deb2ae4347b3a81c3fa12b0b8c976544829396a4"
+                "sha256:059b2ee3194d718896c0ad077dd8c043e5e909d9180f387ce42012662a4946d6",
+                "sha256:1cf708e2ac57f3aabc87405f04b86354f66799c8e62c28c5fc5f88b5521b2dbf",
+                "sha256:24521fa2890642614558b492b473bee0ac1f8057a7263156b02e8b14c88ce6f5",
+                "sha256:4fee71aa5bc6ed9d5f116327c04273e25ae31a3020386916905767ec4fc5317e",
+                "sha256:70024e02197337533eef7b85b068212420f950319cc8c580261963aefc75f811",
+                "sha256:74782fbd4d4f87ff04159e986886931456a1894c61229be9eaf4de6f6e44b99e",
+                "sha256:940532b111b1952befd7db542c370887a8611660d2b9becff75d39355303d82d",
+                "sha256:cb1f2f5e426dc9f07a7681419fe39cee823bb74f723f36f70399123f439e9b20",
+                "sha256:dbbb2379c19ed6042e8f11f2a2c66d39cceb8aeace421bfc29d085d93eda3689",
+                "sha256:e3a057b7a64f1222b56e47bcff5e4b94c4f61faac04c7c4ecb1985e18caa3994",
+                "sha256:e9f45bd5b92c7974e59bcd2dcc8631a6b6cc380a904725fce7bc08872e691615"
             ],
             "index": "pypi",
-            "version": "==5.2"
+            "version": "==5.3"
         },
         "scipy": {
             "hashes": [
-                "sha256:0b8c9dc042b9a47912b18b036b4844029384a5b8d89b64a4901ac3e06876e5f6",
-                "sha256:18ad034be955df046b5a27924cdb3db0e8e1d76aaa22c635403fe7aee17f1482",
-                "sha256:225d0b5e140bb66df23d438c7b535303ce8e533f94454f4e5bde5f8d109103ea",
-                "sha256:2f690ba68ed7caa7c30b6dc48c1deed22c78f3840fa4736083ef4f2bd8baa19e",
-                "sha256:4b8746f4a755bdb2eeb39d6e253a60481e165cfd74fdfb54d27394bd2c9ec8ac",
-                "sha256:4ba2ce1a58fe117e993cf316a149cf9926c7c5000c0cdc4bc7c56ae8325612f6",
-                "sha256:546f0dc020b155b8711159d53c87b36591d31f3327c47974a4fb6b50d91589c2",
-                "sha256:583f2ccd6a112656c9feb2345761d2b19e9213a094cfced4e7d2c1cae4173272",
-                "sha256:64bf4e8ae0db2d42b58477817f648d81e77f0b381d0ea4427385bba3f959380a",
-                "sha256:7be424ee09bed7ced36c9457f99c826ce199fd0c0f5b272cf3d098ff7b29e3ae",
-                "sha256:869465c7ff89fc0a1e2ea1642b0c65f1b3c05030f3a4c0d53d6a57b2dba7c242",
-                "sha256:884e619821f47eccd42979488d10fa1e15dbe9f3b7660b1c8c928d203bd3c1a3",
-                "sha256:a42b0d02150ef4747e225c31c976a304de5dc8202ec35a27111b7bb8176e5f13",
-                "sha256:a70308bb065562afb936c963780deab359966d71ab4f230368b154dde3136ea4",
-                "sha256:b01ea5e4cf95a93dc335089f8fbe97852f56fdb74afff238cbdf09793103b6b7",
-                "sha256:b7b8cf45f9a48f23084f19deb9384a1cccb5e92fbc879b12f97dc4d56fb2eb92",
-                "sha256:bb0899d3f8b9fe8ef95b79210cf0deb6709542889fadaa438eeb3a28001e09e7",
-                "sha256:c008f1b58f99f1d1cc546957b3effe448365e0a217df1f1894e358906e91edad",
-                "sha256:cfee99d085d562a7e3c4afe51ac1fe9b434363489e565a130459307f30077973",
-                "sha256:dfcb0f0a2d8e958611e0b56536285bb435f03746b6feac0e29f045f7c6caf164",
-                "sha256:f5d47351aeb1cb6bda14a8908e56648926a6b2d714f89717c71f7ada41282141"
-            ],
-            "index": "pypi",
-            "version": "==1.3.3"
+                "sha256:00af72998a46c25bdb5824d2b729e7dabec0c765f9deb0b504f928591f5ff9d4",
+                "sha256:0902a620a381f101e184a958459b36d3ee50f5effd186db76e131cbefcbb96f7",
+                "sha256:1e3190466d669d658233e8a583b854f6386dd62d655539b77b3fa25bfb2abb70",
+                "sha256:2cce3f9847a1a51019e8c5b47620da93950e58ebc611f13e0d11f4980ca5fecb",
+                "sha256:3092857f36b690a321a662fe5496cb816a7f4eecd875e1d36793d92d3f884073",
+                "sha256:386086e2972ed2db17cebf88610aab7d7f6e2c0ca30042dc9a89cf18dcc363fa",
+                "sha256:71eb180f22c49066f25d6df16f8709f215723317cc951d99e54dc88020ea57be",
+                "sha256:770254a280d741dd3436919d47e35712fb081a6ff8bafc0f319382b954b77802",
+                "sha256:787cc50cab3020a865640aba3485e9fbd161d4d3b0d03a967df1a2881320512d",
+                "sha256:8a07760d5c7f3a92e440ad3aedcc98891e915ce857664282ae3c0220f3301eb6",
+                "sha256:8d3bc3993b8e4be7eade6dcc6fd59a412d96d3a33fa42b0fa45dc9e24495ede9",
+                "sha256:9508a7c628a165c2c835f2497837bf6ac80eb25291055f56c129df3c943cbaf8",
+                "sha256:a144811318853a23d32a07bc7fd5561ff0cac5da643d96ed94a4ffe967d89672",
+                "sha256:a1aae70d52d0b074d8121333bc807a485f9f1e6a69742010b33780df2e60cfe0",
+                "sha256:a2d6df9eb074af7f08866598e4ef068a2b310d98f87dc23bd1b90ec7bdcec802",
+                "sha256:bb517872058a1f087c4528e7429b4a44533a902644987e7b2fe35ecc223bc408",
+                "sha256:c5cac0c0387272ee0e789e94a570ac51deb01c796b37fb2aad1fb13f85e2f97d",
+                "sha256:cc971a82ea1170e677443108703a2ec9ff0f70752258d0e9f5433d00dda01f59",
+                "sha256:dba8306f6da99e37ea08c08fef6e274b5bf8567bb094d1dbe86a20e532aca088",
+                "sha256:dc60bb302f48acf6da8ca4444cfa17d52c63c5415302a9ee77b3b21618090521",
+                "sha256:dee1bbf3a6c8f73b6b218cb28eed8dd13347ea2f87d572ce19b289d6fd3fbc59"
+            ],
+            "index": "pypi",
+            "version": "==1.4.1"
         },
         "six": {
             "hashes": [
-                "sha256:1f1b7d42e254082a9db6279deae68afb421ceba6158efa6131de7b3003ee93fd",
-                "sha256:30f610279e8b2578cab6db20741130331735c781b56053c59c4076da27f06b66"
+                "sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a",
+                "sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c"
             ],
-            "version": "==1.13.0"
+            "version": "==1.14.0"
         },
         "soupsieve": {
             "hashes": [
@@ -302,11 +302,11 @@
         },
         "sympy": {
             "hashes": [
-                "sha256:31567dc010bff0967ef7a87210acf3f938c6ab24481581fc143536fb103e9ce8",
-                "sha256:8ae4a95378304ed4081921767fe46f0adf5921bf471c9f5df425abf2c655d751"
+                "sha256:4880d3a351558063bd89febda302f220dc4b88de393bba81fa6539a3966f03fa",
+                "sha256:d77901d748287d15281f5ffe5b0fef62dd38f357c2b827c44ff07f35695f4e7e"
             ],
             "index": "pypi",
-            "version": "==1.5"
+            "version": "==1.5.1"
         },
         "toml": {
             "hashes": [
@@ -341,6 +341,13 @@
         }
     },
     "develop": {
+        "appdirs": {
+            "hashes": [
+                "sha256:9e5896d1372858f8dd3344faf4e5014d21849c756c8d5701f78f8a103b372d92",
+                "sha256:d8b24664561d0d34ddfaec54636d502d7cea6e29c3eaf68f3df6180863e2166e"
+            ],
+            "version": "==1.4.3"
+        },
         "aspy.yaml": {
             "hashes": [
                 "sha256:463372c043f70160a9ec950c3f1e4c3a82db5fca01d334b6bc89c7164d744bdc",
@@ -358,10 +365,10 @@
         },
         "cfgv": {
             "hashes": [
-                "sha256:edb387943b665bf9c434f717bf630fa78aecd53d5900d2e05da6ad6048553144",
-                "sha256:fbd93c9ab0a523bf7daec408f3be2ed99a980e20b2d19b50fc184ca6b820d289"
+                "sha256:04b093b14ddf9fd4d17c53ebfd55582d27b76ed30050193c14e560770c5360eb",
+                "sha256:f22b426ed59cd2ab2b54ff96608d846c33dfb8766a67f0b4a6ce130ce244414f"
             ],
-            "version": "==2.0.1"
+            "version": "==3.0.0"
         },
         "coverage": {
             "hashes": [
@@ -401,6 +408,12 @@
             "index": "pypi",
             "version": "==4.5.4"
         },
+        "distlib": {
+            "hashes": [
+                "sha256:2e166e231a26b36d6dfe35a48c4464346620f8645ed0ace01ee31822b288de21"
+            ],
+            "version": "==0.3.0"
+        },
         "entrypoints": {
             "hashes": [
                 "sha256:589f874b313739ad35be6e0cd7efde2a4e9b6fea91edcc34e58ecbb8dbe56d19",
@@ -408,6 +421,13 @@
             ],
             "version": "==0.3"
         },
+        "filelock": {
+            "hashes": [
+                "sha256:18d82244ee114f543149c66a6e0c14e9c4f8a1044b5cdaadd0f82159d6a6ff59",
+                "sha256:929b7d63ec5b7d6b71b0fa5ac14e030b3f70b75747cef1b10da9b879fef15836"
+            ],
+            "version": "==3.0.12"
+        },
         "flake8": {
             "hashes": [
                 "sha256:45681a117ecc81e870cbf1262835ae4af5e7a8b08e40b944a8a6e6b895914cfb",
@@ -418,11 +438,11 @@
         },
         "flake8-annotations": {
             "hashes": [
-                "sha256:5e0228cc4645931b574cdc73d855916a9fa9ea1d40dbda7b2c20d0b04d004f17",
-                "sha256:c7e5059bd62ff6636fe716b2c97bbe31ab35316da4ba69b57e285fb166ffe015"
+                "sha256:47705be09c6e56e9e3ac1656e8f5ed70862a4657116dc472f5a56c1bdc5172b1",
+                "sha256:564702ace354e1059252755be79d082a70ae1851c86044ae1a96d0f5453280e9"
             ],
             "index": "pypi",
-            "version": "==1.1.1"
+            "version": "==1.2.0"
         },
         "flake8-bugbear": {
             "hashes": [
@@ -488,10 +508,10 @@
         },
         "identify": {
             "hashes": [
-                "sha256:7782115794ec28b011702815d9f5e532244560cd2bf0789c4f09381d43befd90",
-                "sha256:9e7521e9abeaede4d2d1092a106e418c65ddf6b3182b43930bcb3c8cfb974488"
+                "sha256:1222b648251bdcb8deb240b294f450fbf704c7984e08baa92507e4ea10b436d5",
+                "sha256:d824ebe21f38325c771c41b08a95a761db1982f1fc0eee37c6c97df3f1636b96"
             ],
-            "version": "==1.4.8"
+            "version": "==1.4.11"
         },
         "junit-xml": {
             "hashes": [
@@ -508,17 +528,17 @@
         },
         "nodeenv": {
             "hashes": [
-                "sha256:ad8259494cf1c9034539f6cced78a1da4840a4b157e23640bc4a0c0546b0cb7a"
+                "sha256:5b2438f2e42af54ca968dd1b374d14a1194848955187b0e5e4be1f73813a5212"
             ],
-            "version": "==1.3.3"
+            "version": "==1.3.5"
         },
         "pre-commit": {
             "hashes": [
-                "sha256:9f152687127ec90642a2cc3e4d9e1e6240c4eb153615cb02aa1ad41d331cbb6e",
-                "sha256:c2e4810d2d3102d354947907514a78c5d30424d299dc0fe48f5aa049826e9b50"
+                "sha256:8f48d8637bdae6fa70cc97db9c1dd5aa7c5c8bf71968932a380628c25978b850",
+                "sha256:f92a359477f3252452ae2e8d3029de77aec59415c16ae4189bcfba40b757e029"
             ],
             "index": "pypi",
-            "version": "==1.20.0"
+            "version": "==1.21.0"
         },
         "pycodestyle": {
             "hashes": [
@@ -544,27 +564,27 @@
         },
         "pyyaml": {
             "hashes": [
-                "sha256:0e7f69397d53155e55d10ff68fdfb2cf630a35e6daf65cf0bdeaf04f127c09dc",
-                "sha256:2e9f0b7c5914367b0916c3c104a024bb68f269a486b9d04a2e8ac6f6597b7803",
-                "sha256:35ace9b4147848cafac3db142795ee42deebe9d0dad885ce643928e88daebdcc",
-                "sha256:38a4f0d114101c58c0f3a88aeaa44d63efd588845c5a2df5290b73db8f246d15",
-                "sha256:483eb6a33b671408c8529106df3707270bfacb2447bf8ad856a4b4f57f6e3075",
-                "sha256:4b6be5edb9f6bb73680f5bf4ee08ff25416d1400fbd4535fe0069b2994da07cd",
-                "sha256:7f38e35c00e160db592091751d385cd7b3046d6d51f578b29943225178257b31",
-                "sha256:8100c896ecb361794d8bfdb9c11fce618c7cf83d624d73d5ab38aef3bc82d43f",
-                "sha256:c0ee8eca2c582d29c3c2ec6e2c4f703d1b7f1fb10bc72317355a746057e7346c",
-                "sha256:e4c015484ff0ff197564917b4b4246ca03f411b9bd7f16e02a2f586eb48b6d04",
-                "sha256:ebc4ed52dcc93eeebeae5cf5deb2ae4347b3a81c3fa12b0b8c976544829396a4"
+                "sha256:059b2ee3194d718896c0ad077dd8c043e5e909d9180f387ce42012662a4946d6",
+                "sha256:1cf708e2ac57f3aabc87405f04b86354f66799c8e62c28c5fc5f88b5521b2dbf",
+                "sha256:24521fa2890642614558b492b473bee0ac1f8057a7263156b02e8b14c88ce6f5",
+                "sha256:4fee71aa5bc6ed9d5f116327c04273e25ae31a3020386916905767ec4fc5317e",
+                "sha256:70024e02197337533eef7b85b068212420f950319cc8c580261963aefc75f811",
+                "sha256:74782fbd4d4f87ff04159e986886931456a1894c61229be9eaf4de6f6e44b99e",
+                "sha256:940532b111b1952befd7db542c370887a8611660d2b9becff75d39355303d82d",
+                "sha256:cb1f2f5e426dc9f07a7681419fe39cee823bb74f723f36f70399123f439e9b20",
+                "sha256:dbbb2379c19ed6042e8f11f2a2c66d39cceb8aeace421bfc29d085d93eda3689",
+                "sha256:e3a057b7a64f1222b56e47bcff5e4b94c4f61faac04c7c4ecb1985e18caa3994",
+                "sha256:e9f45bd5b92c7974e59bcd2dcc8631a6b6cc380a904725fce7bc08872e691615"
             ],
             "index": "pypi",
-            "version": "==5.2"
+            "version": "==5.3"
         },
         "six": {
             "hashes": [
-                "sha256:1f1b7d42e254082a9db6279deae68afb421ceba6158efa6131de7b3003ee93fd",
-                "sha256:30f610279e8b2578cab6db20741130331735c781b56053c59c4076da27f06b66"
+                "sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a",
+                "sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c"
             ],
-            "version": "==1.13.0"
+            "version": "==1.14.0"
         },
         "snowballstemmer": {
             "hashes": [
@@ -591,10 +611,10 @@
         },
         "virtualenv": {
             "hashes": [
-                "sha256:0d62c70883c0342d59c11d0ddac0d954d0431321a41ab20851facf2b222598f3",
-                "sha256:55059a7a676e4e19498f1aad09b8313a38fcc0cdbe4fdddc0e9b06946d21b4bb"
+                "sha256:531b142e300d405bb9faedad4adbeb82b4098b918e35209af2adef3129274aae",
+                "sha256:5dd42a9f56307542bddc446cfd10ef6576f11910366a07609fe8d0d88fa8fb7e"
             ],
-            "version": "==16.7.9"
+            "version": "==20.0.5"
         }
     }
 }
diff --git a/docker/venv.Dockerfile b/docker/venv.Dockerfile
index b415430..fe5b10d 100644
--- a/docker/venv.Dockerfile
+++ b/docker/venv.Dockerfile
@@ -4,10 +4,14 @@ ARG DEV
 ENV PIP_NO_CACHE_DIR=false \
     PIPENV_DONT_USE_PYENV=1 \
     PIPENV_HIDE_EMOJIS=1 \
-    PIPENV_NOSPIN=1 \
-    PIPENV_VENV_IN_PROJECT=1
+    PIPENV_NOSPIN=1
 
 COPY Pipfile Pipfile.lock snekbox.cfg /snekbox/
 WORKDIR /snekbox
 
-RUN if [ -n "${DEV}" ]; then pipenv sync --dev; else pipenv sync; fi
+RUN if [ -n "${DEV}" ]; \
+    then \
+        pipenv install --deploy --system --dev; \
+    else \
+        pipenv install --deploy --system; \
+    fi
diff --git a/scripts/.profile b/scripts/.profile
index 73fbb28..69ad959 100644
--- a/scripts/.profile
+++ b/scripts/.profile
@@ -17,5 +17,5 @@ nsjpy() {
     nsjail \
         --config "${NSJAIL_CFG:-/snekbox/snekbox.cfg}" \
         $nsj_args -- \
-        /snekbox/.venv/bin/python3 -Iqu -c "$@"
+        /usr/local/bin/python -Iqu -c "$@"
 }
diff --git a/snekbox.cfg b/snekbox.cfg
index 968271c..2e8b2e0 100644
--- a/snekbox.cfg
+++ b/snekbox.cfg
@@ -81,6 +81,27 @@ mount {
     rw: false
 }
 
+mount {
+    src: "/usr/local/bin/python"
+    dst: "/usr/local/bin/python"
+    is_bind: true
+    rw: false
+}
+
+mount {
+    src: "/usr/local/bin/python3"
+    dst: "/usr/local/bin/python3"
+    is_bind: true
+    rw: false
+}
+
+mount {
+    src: "/usr/local/bin/python3.8"
+    dst: "/usr/local/bin/python3.8"
+    is_bind: true
+    rw: false
+}
+
 cgroup_mem_max: 52428800
 cgroup_mem_mount: "/sys/fs/cgroup/memory"
 cgroup_mem_parent: "NSJAIL"
@@ -92,6 +113,6 @@ cgroup_pids_parent: "NSJAIL"
 iface_no_lo: true
 
 exec_bin {
-    path: "/snekbox/.venv/bin/python3"
+    path: "/usr/local/bin/python"
     arg: "-Iqu"
 }