diff --git a/.gitignore b/.gitignore
index 08e9c0c..6710db2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,13 @@
 !README.org
 !init.el
 
+# track versions of installed packages
+!straight
+straight/*
+!straight/versions
+straight/versions/*
+!straight/versions/default.el
+
 !etc
 etc/*
 !etc/conf.org
diff --git a/straight/versions/default.el b/straight/versions/default.el
new file mode 100644
index 0000000..97c6944
--- /dev/null
+++ b/straight/versions/default.el
@@ -0,0 +1,129 @@
+(("ESS" . "1baf8bf1403fe5956a25475b03be0d8f02b3f3ca")
+ ("Highlight-Indentation-for-Emacs" . "d03803f2c06749c430443a3d24e039cbafc9c58f")
+ ("ace-window" . "c7cb315c14e36fded5ac4096e158497ae974bec9")
+ ("anaconda-mode" . "73266a48fa964d44268c3f3478597e553b9843f1")
+ ("annalist.el" . "134fa3f0fb91a636a1c005c483516d4b64905a6d")
+ ("auctex" . "59e251c4c82d878e605a13aec3752e544a99f21a")
+ ("avy" . "bbf1e7339eba06784dfe86643bb0fbddf5bb0342")
+ ("beacon" . "bde78180c678b233c94321394f46a81dc6dce1da")
+ ("biblio.el" . "eb9baf1d2bf6a073d24ccb717025baa693e98f3e")
+ ("blacken" . "784da60033fe3743336d1da0f33239f1bf514266")
+ ("c-eldoc" . "e35c0e40f71c25804919f6c01fd27e95c2e2adb7")
+ ("clang-format" . "e48ff8ae18dc7ab6118c1f6752deb48cb1fc83ac")
+ ("company-anaconda" . "da1566db41a68809ef7f91ebf2de28118067c89b")
+ ("company-auctex" . "9400a2ec7459dde8cbf1a5d50dfee4e300ed7e18")
+ ("company-c-headers" . "5e676ab0c2f287c868b1e3931afd4c78895910cd")
+ ("company-irony" . "b44711dfce445610c1ffaec4951c6ff3882b216a")
+ ("company-math" . "a796053590012e6a15c8b527b521ffc15d137bd0")
+ ("company-mode" . "57a6554db750567917f1192463e2503787f9b883")
+ ("csv-mode" . "635337407c44c1c3e9f7052afda7e27cf8a05c14")
+ ("dash.el" . "b92ab5a39b987e4fe69317b9d9fda452300baf20")
+ ("delight" . "70cb8cec9e5eb2c24364e065d85c2ea8f14a587c")
+ ("dired-du" . "d6571317673ba44566ba411d26b7af74e3139ff7")
+ ("dired-hacks" . "f49a8bbf95f70671a74a24f7f4de453b2686be46")
+ ("dockerfile-mode" . "d31f7685ebc5832d957e25070a930aa42984327d")
+ ("ebib" . "805c2e30e30f9f211f4aa443263d1c3971935295")
+ ("elpy" . "c766feb5c34dd17b7afba480ae9e90a08d75012c")
+ ("emacs-async" . "36a10151e70e956e2f766ed9e65f4a9cfc8479b2")
+ ("emacs-buttercup" . "4d974d28d4525533ec72b1e5885f8b72b387c5fb")
+ ("emacs-calfw" . "03abce97620a4a7f7ec5f911e669da9031ab9088")
+ ("emacs-dashboard" . "bf38867ae80902d58207974b4a2bba4249324599")
+ ("emacs-deferred" . "2239671d94b38d92e9b28d4e12fd79814cfb9c16")
+ ("emacs-htmlize" . "49205105898ba8993b5253beec55d8bddd820a70")
+ ("emacs-refactor" . "a8f6ab823453decf43f0764d02e554d05009a631")
+ ("emacs-web-server" . "22ce66ea43e0eadb9ec1d691a35d9695fc29cee6")
+ ("emacs-which-key" . "3642c11d5ef9be3c6fb9edb8fd5ec3c370abd889")
+ ("emacsmirror-mirror" . "afd29fd15a13cbc2c0fa9c094edc5f3f39ef6d30")
+ ("epl" . "78ab7a85c08222cd15582a298a364774e3282ce6")
+ ("evil" . "1e7aa5bfbd86feff0ed5982e487070352d326b90")
+ ("evil-ReplaceWithRegister" . "91cc7bf21a94703c441cc9212214075b226b7f67")
+ ("evil-collection" . "c136589d9584e5d01a4b3f2e4cf8ac5f5a23be63")
+ ("evil-commentary" . "395f91014b69844b81660c155f42eb9b1b3d199d")
+ ("evil-magit" . "88dc26ce59dbf4acb4e2891c79c4bd329553ba56")
+ ("evil-org-mode" . "4b23116a6ecfa687819050e5a9a419cf08d5ba90")
+ ("evil-surround" . "346d4d85fcf1f9517e9c4991c1efe68b4130f93a")
+ ("f.el" . "1814209e2ff43cf2e6d38c4cd476218915f550fb")
+ ("fill-column-indicator" . "c35f9de072c241699b57bcb46da84bed5af29cfe")
+ ("flycheck" . "c02cd773dded0215f9417ec04dfe8dabda63ef43")
+ ("flycheck-clang-analyzer" . "0c9b6e4626cd5376037464f8d6b8c64aa32768ee")
+ ("flycheck-package" . "64cf27d69051e02a32e3c517cbfea23f9d2d7557")
+ ("gnu-elpa-mirror" . "2ff1550c81616c9e8987ca2bec36397ebd6fa1b0")
+ ("goto-chg" . "85fca9f7d8b04be3fbb37cc5d42416f3c4d32830")
+ ("haskell-mode" . "41683c0e634bb3f54eac8747919a82132e1714fe")
+ ("helm" . "f22ed667ab086e96a3f08992f2471aefac13a20b")
+ ("helm-bibtex" . "8a0dd9841316793aacddea744d6b8ca4a7857a35")
+ ("helm-flyspell" . "8d4d947c687cb650cb149aa2271ad5201ea92594")
+ ("helm-swoop" . "1f7d3cf0d742b199e4ce13fcb8b19c977a44611e")
+ ("ht.el" . "fff8c43f0e03d5b98deb9f988522b839ce2ca253")
+ ("hydra" . "112e689f75b59398d8eca79ac6562dca12b8a959")
+ ("iedit" . "59430e8c11c1fa9a294a070a3b1d571bd3887806")
+ ("impatient-mode" . "cbddfd54242210df3e1c3b590fada5bb5423f5ed")
+ ("inf-ruby" . "9f0f79ff459c7c417e8931ca020db121e24b45b5")
+ ("irony-mode" . "1e1aabaa686a08767ab33e5cd43ce8f0ebf8d020")
+ ("jinja2-mode" . "ecd19a40b7832bb00f0a2244e3b0713d0bf3850d")
+ ("js-comint" . "0dedaf4753fbe8cdbab14aa85f05d7673cbee8b6")
+ ("json-mode" . "0e819e519ae17a2686e0881c4ca51fa873fa9b83")
+ ("json-reformat" . "8eb6668ed447988aea06467ba8f42e1f2178246f")
+ ("json-snatcher" . "c4cecc0a5051bd364373aa499c47a1bb7a5ac51c")
+ ("key-chord" . "72443e9ff3c4f1c3ccaced3130236801efde3d83")
+ ("let-alist" . "b299c78897cc307f9d5521927376fbd06a26f123")
+ ("libmpdee" . "a6ca3b7d6687f3ba60996b9b5044ad1d3b228290")
+ ("lispy" . "a83b66b1ab9457124ba1f6027c884f077ee9b57a")
+ ("list-utils" . "9bb2487c83ec46a0b6e6c4158af69334ac797b82")
+ ("lua-mode" . "35b6e4c20b8b4eaf783ccc8e613d0dd06dbd165c")
+ ("magit" . "321214c3a2dd10fdf672ba96bd00703a51094bbe")
+ ("markdown-mode" . "ef2cb4d94af68908a4963afa492afba876725128")
+ ("math-symbol-lists" . "1cf7e2885f3352f55852ee9eba26c7cb5a7cd74b")
+ ("melpa" . "8d09efb2e93fefd5158685084691ccf20178fe78")
+ ("mingus" . "4223be618f57f10f18114a74393a71955b568884")
+ ("no-littering" . "aaa3c36b25e07017595b54e91e190f69f0de0487")
+ ("org-brain" . "671db0e08b91c7d2637d765a7afca8b2561275c8")
+ ("org-bullets" . "767f55feb58b840a5a04eabfc3fbbf0d257c4792")
+ ("org-ref" . "831fe96c242bf178f0c55b93fd076dfb549f7791")
+ ("org-rifle" . "263f56d70112f5d0496684c89a2aa07959e0a95f")
+ ("org-super-agenda" . "dd0d104c269fab9ebe5af7009bc1dd2a3a8f3c12")
+ ("origami.el" . "e558710a975e8511b9386edc81cd6bdd0a5bda74")
+ ("outline-magic" . "2a5f07417b696cf7541d435c43bafcc64817636b")
+ ("package-lint" . "c4b16a90196d6d83d6ba668923c1ce725e13a5d6")
+ ("page-break-lines" . "f8c4cd7fc67638ae4113551dcffdf87fcd252d9b")
+ ("paredit" . "8330a41e8188fe18d3fa805bb9aa529f015318e8")
+ ("parsebib" . "3497b6068d78ae15ba1eaf94e4315d18e9ae6b00")
+ ("pcre2el" . "0b5b2a2c173aab3fd14aac6cf5e90ad3bf58fa7d")
+ ("pdf-tools" . "c510442ab89c8a9e9881230eeb364f4663f59e76")
+ ("php-mode" . "f4c7c6995dadcdc6da5fefadfd362f8418b2eec1")
+ ("pkg-info" . "76ba7415480687d05a4353b27fea2ae02b8d9d61")
+ ("pkgbuild-mode" . "b55e21f244d7ee6171a0c14437d09f33d5dac318")
+ ("poly-R" . "51ffeb6ec45dd44eafa4d22ad2d6150cc4b248fc")
+ ("poly-markdown" . "1536cf0c32f71d5cd05c90f7905905e38006e95d")
+ ("poly-noweb" . "3b0cd36ca9a707e8a09337a3468fa85d81fc461c")
+ ("polymode" . "3284ff10017d280ba82f27dc20fe5223b0df709c")
+ ("popup-el" . "9d104d4bbbcb37bbc9d9ce762e74d41174683f86")
+ ("powerline" . "edbb464eef680efc9d408730288c716cd4cac404")
+ ("projectile" . "2eaf2c0e2d42457b55068d92659ef14195e12918")
+ ("pyenv-mode" . "d191037fe62ed8d4fee5888845da3e2c386d8e89")
+ ("pythonic" . "51233ec7ec9fbafd13e2b0479c7b2ee0930ccca5")
+ ("pyvenv" . "861998b6d157ae73b829f02a5a6c8a9118310831")
+ ("rainbow-delimiters" . "5125f4e47604ad36c3eb4706310fcafac729ca8c")
+ ("rainbow-mode" . "fdff98b12e62df7a6dbb009321430c90a47bb89b")
+ ("robe" . "082da38797d247f9c64568ad712a345e041d5c84")
+ ("ruby-test-mode" . "5bb6b7b7ba0a4c91ba2e029853215e76e5df7772")
+ ("rvm.el" . "081d5173158054c6d0780b9462c74c5697eac1fc")
+ ("s.el" . "43ba8b563bee3426cead0e6d4ddc09398e1a349d")
+ ("sound-wav" . "8a18f8a62f4fdde80dfa069986aa959091a42472")
+ ("spaceline" . "1b26af2c1a701481ac5d90928fe0200e389756c3")
+ ("spacemacs-theme" . "462ef2ac16ab8c51de21d5f3d2b1b6122b314391")
+ ("straight.el" . "5d046ad09413f3aba6198229e392cdd3f07e77ee")
+ ("sudo-edit" . "0e2c32b5e5242d30f8780cbe8e1b1649476cac4d")
+ ("swiper" . "9619e3ccc4e9179780cf48b7abb24239037791d7")
+ ("systemd-mode" . "51c148e09a129ddf33d95276aa0e89d4ef6f8dd2")
+ ("tablist" . "faab7a035ef2258cc4ea2182f67e3aedab7e2af9")
+ ("toc-org" . "5deaec41ed0e5c51715737d7f74c5ae1b3c00387")
+ ("transient" . "4d44d08e90355a8ef36aaad1f9f79c95de1ce0e9")
+ ("ts.el" . "df48734ef046547c1aa0de0f4c07d11964ef1f7f")
+ ("undo-tree" . "5b6df03781495d8a25695d846b0cce496d3d3058")
+ ("use-package" . "4fb1f9a68f1e7e7d614652afc017a6652fd029f1")
+ ("with-editor" . "efafd482c21b90decbb0b682ed3159c86014d4f3")
+ ("yaml-mode" . "68fecb5f0dec712a10c8655df6881392a4613617")
+ ("yasnippet" . "5cbdbf0d2015540c59ed8ee0fcf4788effdf75b6")
+ ("zoutline" . "63756846f8540b6faf89d885438186e4fe1c7d8a"))
+:beta