hash mismatch in fixed-output derivation fix-follows.diff

[montchr]

Expected Behavior

Running nix-shell in template repo on a fresh install of NixOS 21.05 should succeed.

Current Behavior

After cloning the repo and running nix-shell from within its directory, the build fails due to the following error:

hash mismatch in fixed-output derivation '/nix/store/avfapjldz0a50cc1g8ckr7s0786djnd7-fix-follows.diff':
  wanted: sha256:1ns60jk9w593xza8d4arggqk9yjpfb7fhf2yd36pixajbd5cq8lz
  got:    sha256:05r5icbxblm6ir73smpfjwca69w91aw1dkbk43a3v6454mpn04yk
cannot build derivation '/nix/store/0xmncxl92cw09w1cjl8adp3wbnl79wsn-nix-2.4pre20210707_02dd6bb.drv': 1 dependencies couldn't be built

Full output:

[cdom@nixos:~]$ git clone /~https://github.com/divnix/devos
Cloning into 'devos'...
remote: Enumerating objects: 6632, done.
remote: Counting objects: 100% (1871/1871), done.
remote: Compressing objects: 100% (827/827), done.
remote: Total 6632 (delta 1164), reused 1557 (delta 1014), pack-reused 4761
Receiving objects: 100% (6632/6632), 3.63 MiB | 13.66 MiB/s, done.
Resolving deltas: 100% (3701/3701), done.

[cdom@nixos:~]$ cd devos

[cdom@nixos:~/devos]$ nix-shell
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint: 
hint: 	git config --global init.defaultBranch <name>
hint: 
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint: 
hint: 	git branch -m <name>
these derivations will be built:
  /nix/store/0hj1h74964wmw4zrpziqqdxia4gwakwz-unpack-pin-utils-0.1.0.drv
  /nix/store/0kr8sriwh2icrfjx8plx3yyhyf782v1h-unpack-anymap-0.12.1.drv
  /nix/store/0wvrc4r8djfgdvlk13dqfbsgnf0b8cr7-unpack-wasi-0.10.0+wasi-snapshot-preview1.drv
  /nix/store/rbgwk3hd9xprwgjr9ndrwf1vdbsai3wc-fix-follows.diff.drv
  /nix/store/0xmncxl92cw09w1cjl8adp3wbnl79wsn-nix-2.4pre20210707_02dd6bb.drv
  /nix/store/0zrqmzsk6avdkldy3yi9361yslx5njgv-unpack-ntapi-0.3.6.drv
  /nix/store/10qy6s0h7ql4p9nc9ydqjs793aglj5bf-unpack-indexmap-1.6.0.drv
  /nix/store/13b6m039rgqjs5r4prlgxbaimz02ak0x-unpack-proc-macro-hack-0.5.19.drv
  /nix/store/1akq4djlxa53yv0g9dv4wdpr8r0p7ayr-unpack-fsevent-2.0.2.drv
  /nix/store/1b506vlm7n27br65cvw146nayxnjf449-unpack-notify-5.0.0-pre.4.drv
  /nix/store/1g6h3wmbfs56p4nflh81c8wksj2fxynd-unpack-mio-0.7.6.drv
  /nix/store/1rrnhy4hi7fbiv48rfqvq7ib1j57bxpk-unpack-cfg-if-1.0.0.drv
  /nix/store/1yxpmf39jv2wwvnaiix7v3m8rj5i24vs-utils-update.bash.drv
  /nix/store/2303k8zx1da5as2s3k5qjrkh3b3zf35v-unpack-text_unit-0.1.10.drv
  /nix/store/2wyxvrs7syy1nz3slnn9k6kyr4r6521z-unpack-strsim-0.10.0.drv
  /nix/store/38qj9dfw88xfm3dx3phf0ahdn12m8cmy-unpack-winapi-0.2.8.drv
  /nix/store/3mcslwwyab0mkqdmb3v0valab7jgngb3-unpack-chrono-0.4.19.drv
  /nix/store/453736c5v5l9a6fw6j3nk63wgd5f0zky-unpack-hashbrown-0.9.1.drv
  /nix/store/478w411728ig266q7j9vy6qysc0v5j99-unpack-signal-hook-registry-1.3.0.drv
  /nix/store/4dn5ay481b436chh7bky5hb51alb0kw4-unpack-fork-0.1.18.drv
  /nix/store/4i4j0jz7wdav2702rpdhfa4lsn6ki66f-nixos-rebuild.drv
  /nix/store/4ppzgrjlrr7w354y4430ks41a0zhl0r6-unpack-toml-0.5.7.drv
  /nix/store/4z8i3l98h7s817h832g1gs0n3ny3l0wy-unpack-proc-macro2-1.0.27.drv
  /nix/store/57wm10yf5bxasyl8idz054sspwgdv1kr-unpack-atty-0.2.14.drv
  /nix/store/5ywv1b2pddykfdp9ygn31dbvh2pff1sc-hosts-rebuild.bash.drv
  /nix/store/65ky5zy9rpkw4pp5cb23c97hbzl395ld-hm-home.bash.drv
  /nix/store/6cqf2aaj0cavbz33l625vgj0x9ll4zs8-unpack-lock_api-0.4.2.drv
  /nix/store/6w39qzb4wdf3dbxfc3nahkngjzar4fxz-unpack-regex-1.4.2.drv
  /nix/store/7gqwbcp0gz0v6iqdzr93rp5pdccs421m-unpack-autocfg-1.0.1.drv
  /nix/store/7wfv8dvdnzvhs60blh1r8ik1vak3g7ip-unpack-serde-1.0.118.drv
  /nix/store/8hx3dayqrm3ivd6xf7d2i29p26hb01z9-unpack-thiserror-1.0.22.drv
  /nix/store/8lqf9fcrbm8hj7nj3lp7ky9yskz150vn-unpack-smol_str-0.1.16.drv
  /nix/store/8mmrqnwbs20cin290r6887as9vgv56hc-unpack-once_cell-1.5.2.drv
  /nix/store/8n6i4zk8wmp19sjn73kzim68n5hgjzn4-unpack-miow-0.2.2.drv
  /nix/store/977394xqy3jkyllr5v1025l3c6bsj015-unpack-mio-0.6.23.drv
  /nix/store/9lj8fkxkmgw9rlyv00gkr1yw6hb6w0lx-unpack-yansi-0.5.0.drv
  /nix/store/ahsx31dj6whz6ymz8pww32vz3a3jrzdp-unpack-same-file-1.0.6.drv
  /nix/store/b4nmc4vl5zjv55jyr1s8xcaz6qn032ml-unpack-winapi-build-0.1.1.drv
  /nix/store/bavap8jphp18hz9pphv9mbrla520blkj-unpack-walkdir-2.3.1.drv
  /nix/store/bb8jkmy2yak73l1y1q47lp0f5qk03zr3-unpack-miow-0.3.6.drv
  /nix/store/bhwvdm82xmhb06mvz7915ws2lsmwx2mw-unpack-textwrap-0.12.1.drv
  /nix/store/bmrkfam3s0xbyxaam4fqpx93076w0j7n-unpack-fsevent-sys-3.0.2.drv
  /nix/store/c469pdxmsixqd5850yvpx5y1asx59pgy-unpack-scopeguard-1.1.0.drv
  /nix/store/ca5gmj72n9g06gbzrj02i3gpr8nx17js-unpack-instant-0.1.9.drv
  /nix/store/cdnlandfb4yf9jgqj2qa4c4knpm92ld9-unpack-rowan-0.9.1.drv
  /nix/store/cscp70fcjv6gqpzfbzq1s20mw8pvqc6d-unpack-termcolor-1.1.2.drv
  /nix/store/dgfbddp068x82x9mbqc75qczif4iqlyk-unpack-hermit-abi-0.1.17.drv
  /nix/store/dl8ckpbcgphq2g5jvcbhp6d810q8h7ra-unpack-unicode-segmentation-1.7.1.drv
  /nix/store/dq0xzlypx4x2v3p6mjkgvpnd8x5mc4yg-unpack-lazycell-1.3.0.drv
  /nix/store/dqpx5524afvdm251fx8jyf261csp7lny-unpack-smallvec-1.5.1.drv
  /nix/store/f2qzalzc5hkgsb2r22n2vlx3vbq3zy4g-unpack-fuchsia-zircon-0.3.3.drv
  /nix/store/f4gkycbpc6sarkl8bxskz47yxs3pk7jz-unpack-futures-util-0.3.8.drv
  /nix/store/fz0plifhhc00qxbpknr07x6g5v3ipi7a-unpack-lazy_static-1.4.0.drv
  /nix/store/g4xab2dc9h9y9ps1jwx8n489kh8rs6g2-unpack-futures-task-0.3.8.drv
  /nix/store/g5nijnwzh4604ddkdi2xl946agzc9sd4-unpack-winapi-i686-pc-windows-gnu-0.4.0.drv
  /nix/store/grl5v1fl1c40f1m9hm6mpgwj16pffmsz-unpack-flexi_logger-0.16.2.drv
  /nix/store/h0dx99r94izqbd9rkdi6a356p8wivv7l-unpack-ws2_32-sys-0.2.1.drv
  /nix/store/h4z12afvh2hn78wj0cnnx6515n44dp76-unpack-time-0.1.44.drv
  /nix/store/ha2zc7zrkk49w140n77gyrrnssvvp8pl-unpack-thiserror-impl-1.0.22.drv
  /nix/store/hnjxf2w752xsrbn3cs1vq5x801gal388-unpack-fuchsia-zircon-sys-0.3.3.drv
  /nix/store/hr351ll38vx56bb35qq6aqx11lgcp2vb-unpack-serde_json-1.0.60.drv
  /nix/store/ic7ww42alwyk7sx58nnny7zx9df6x0ip-unpack-serde_derive-1.0.118.drv
  /nix/store/idfn3db6vzigssibf3i39vl8pr3m6wb4-unpack-vec_map-0.8.2.drv
  /nix/store/idjr1rsjxvr3z14723wqa7nd0ndmrxjh-unpack-num_cpus-1.13.0.drv
  /nix/store/iicc04p20z6174gdry2fsd53dm0gxxl0-unpack-ryu-1.0.5.drv
  /nix/store/ilr75kygrb0qz2jhxjdxvc9xrbfdl2h0-unpack-futures-macro-0.3.8.drv
  /nix/store/imidj4dzml887fhkah1gi1ia5d87pn48-unpack-quote-1.0.7.drv
  /nix/store/imvh0pz8hr3ss6wbdnrxysynhgrmkf4h-unpack-crossbeam-channel-0.4.4.drv
  /nix/store/ir9b0xlrl5ckm4638vdvxy1qmb70icfv-unpack-yn-0.1.1.drv
  /nix/store/ivfyhzrj45cbikjxpddxhjfbbr2fkp6z-unpack-thread_local-1.0.1.drv
  /nix/store/izzdw4k1pm59qql8vhqzynng0wgwgrxz-unpack-thin-dst-1.1.0.drv
  /nix/store/j8xpaggnkgdsswndpv95alcb5b27f8l1-unpack-winapi-0.3.9.drv
  /nix/store/jnyrk5k2vhapkffsvl2mf7c9arcd8xki-unpack-num-traits-0.2.14.drv
  /nix/store/jrmy5b0djmiphkhlvkfp7kjj1vb2gw0w-unpack-redox_syscall-0.1.57.drv
  /nix/store/jvmpl7vhgl1415cnmzl9s5q9wnic2fxp-unpack-syn-1.0.73.drv
  /nix/store/kjixz2n7zbzhyij1w4bbvz2rlspyb689-unpack-proc-macro-error-1.0.4.drv
  /nix/store/la3s5yxvvddvhi5iqywcfgspixd9133l-unpack-cbitset-0.2.0.drv
  /nix/store/lcy8c49s9ap7pfpfb4v2qiq1814alzs5-unpack-rustc-hash-1.1.0.drv
  /nix/store/ld7abxlp6rc2khvk68k2isav448av4n4-unpack-slab-0.4.2.drv
  /nix/store/lmfylg3j44cpfghxcrcqsiz81yb247rd-unpack-heck-0.3.1.drv
  /nix/store/m1xmpkpvdqpnpayl7r0bh1y67njaizlk-unpack-signal-hook-0.3.1.drv
  /nix/store/mp8n0x5b3jdmkzszv4ipadnq83z5yqm6-unpack-libc-0.2.81.drv
  /nix/store/mx70517vrfj607kp1qg79sfxik5c5fcd-unpack-num-integer-0.1.44.drv
  /nix/store/n701zdqa8jp1d821cq8fcydrwyydgwwq-unpack-tokio-1.9.0.drv
  /nix/store/nfg8sz9xnwlqayw0qi1ypx2gxdjarw9n-unpack-proc-macro-error-attr-1.0.4.drv
  /nix/store/ngcfhrgw5j63gawpkr23jxlm6p97x11h-unpack-kernel32-sys-0.2.2.drv
  /nix/store/nnrsa9dayqi9dbz1yn5qys2bxycwwq02-unpack-inotify-0.8.3.drv
  /nix/store/nx8ahi1x4iajdh6dfl9xywc6f3ixpfs6-unpack-socket2-0.3.17.drv
  /nix/store/pgz7pgml6ihz74ldczg46awx4kr1h74p-unpack-bytes-1.0.1.drv
  /nix/store/plw00ppmpg9m4q2p49a1bmrf4pkxx3bc-unpack-merge-0.1.0.drv
  /nix/store/psi5wpnz3zfajbsfcrxp4d6igbjx43sr-unpack-parking_lot-0.11.1.drv
  /nix/store/py7gw3yx39gww35pnqsknkdajpy2jplb-unpack-rnix-0.8.0.drv
  /nix/store/q8alyrjyw63bjinq6hwm46qbm48c5isr-unpack-filetime-0.2.13.drv
  /nix/store/qi5sjqdbaf0s33dg252j05cliy3a16qk-unpack-pin-project-internal-1.0.2.drv
  /nix/store/qk0f3b3v5jaa1bkpgyf1s0rn7k12p57j-unpack-merge_derive-0.1.0.drv
  /nix/store/qn166xfk4d1kf5761nkgbfyajc4g01mq-unpack-tokio-macros-1.3.0.drv
  /nix/store/qr5yg1cknqyh93dzvgrzk0lblrh901zn-unpack-glob-0.3.0.drv
  /nix/store/qy88wam0wxjvcpnadvrrwlaan6q7s77d-unpack-maybe-uninit-2.0.0.drv
  /nix/store/r301kzw34wncd5q3xndg3a4g482hliaw-unpack-clap_derive-3.0.0-beta.2.drv
  /nix/store/rnwp6khbxz7yfmscm0zlv80sjllj59g1-unpack-proc-macro-nested-0.1.6.drv
  /nix/store/s7m0nz7wda8ksxmg5yk3m918dvfzkpcy-unpack-winapi-x86_64-pc-windows-gnu-0.4.0.drv
  /nix/store/sihag530rad21w2pz1ic7r5r4cqcfn60-unpack-crossbeam-utils-0.7.2.drv
  /nix/store/sjlgkfrv1bmk49gxpd3pgkw7sxdgc0gx-unpack-inotify-sys-0.1.4.drv
  /nix/store/sl8bsy6zbv6mfijz3w7by5l0480x83nx-unpack-net2-0.2.37.drv
  /nix/store/spj1idisbrl70x71438yrpwf59j48fa1-unpack-pin-project-1.0.2.drv
  /nix/store/svdzf2j04hw9li7b18y69s08z15hr108-unpack-os_str_bytes-2.4.0.drv
  /nix/store/vd9p9k4dxq594qwvyqvg5y1fqnny060x-unpack-whoami-0.9.0.drv
  /nix/store/w57ancww9711ac9i7zkpnwszv0r9hr2f-unpack-unicode-width-0.1.8.drv
  /nix/store/wj9ahdq1nzg4gs33nz58hz1bkl3szf4l-unpack-mio-extras-2.0.6.drv
  /nix/store/wkyzd58fa6lawwzfw7lslzp5wrl1bvxg-unpack-regex-syntax-0.6.21.drv
  /nix/store/wmd9rabhvnnk9sz18mhk7i75pab0asby-unpack-iovec-0.1.4.drv
  /nix/store/x418sahaj405pgsxzlcsv7q46fp751g2-unpack-futures-core-0.3.8.drv
  /nix/store/xcpg1pcwrrpn2qvk6sjhhqrw7dprc16w-unpack-log-0.4.11.drv
  /nix/store/xwkyqr4ar8dhg61cxzsspaqz89ffhz14-unpack-winapi-util-0.1.5.drv
  /nix/store/y781pdd9lplg965x9q1ayap6kf3j2im0-unpack-clap-3.0.0-beta.2.drv
  /nix/store/yb3pwa4ymvhdd2vwkl2a5lq8rppcsmj5-unpack-memchr-2.3.4.drv
  /nix/store/yg7416v0jhr28vg5kmnkmp38c0yhzkw4-unpack-pin-project-lite-0.2.0.drv
  /nix/store/yzxiljcw33rpprm9q4wxss324wgz8kfv-unpack-unicode-xid-0.2.1.drv
  /nix/store/z75g6z3jc04n0sbqhsbm45mj6hag15nq-unpack-parking_lot_core-0.8.1.drv
  /nix/store/zbxs695hrvvh4pbjvcm9jhpnbwl8y1c9-unpack-bitflags-1.2.1.drv
  /nix/store/zddbdjqb8yin4rijyy3878ncg1219p57-unpack-itoa-0.4.6.drv
  /nix/store/zx0cfnlgb10ig967hwwaaq1ikdfpq8vd-unpack-version_check-0.9.2.drv
  /nix/store/zzn1y8zciyq4kq2hq93py1zgfr5k2l0p-unpack-cfg-if-0.1.10.drv
  /nix/store/s1wx1cprmijd3zxgfb4sicp2qad752bs-crates-io.drv
  /nix/store/j0wamhf3xlcggwcxcj02fh3qp2zagqj7-deploy-rs-deps-0.1.0.drv
  /nix/store/r1f53alam03lv9ziszfma9lmhdpv0zh6-deploy-rs-0.1.0.drv
  /nix/store/vpvzjadm2kp4ib94hpzzdwv359rh826w-source.drv
  /nix/store/zf4b84nsjvhgm10gy39irasg1dn1iz53-python3.8-nvchecker-2.3.drv
  /nix/store/s6g66mn6s0src5hzc4aiy47wfpfyn5z3-nvfetcher-0.3.0.0.drv
  /nix/store/s1qxz35pfhdgcc1gyaamnzq9lfga2mg7-nvfetcher.drv
  /nix/store/fg8ci0m70vw6hh1v13zmsk6nf0fwgi0p-vjjpddjf4h9kn5va8adm4dai8s126j1v-repl.drv
  /nix/store/g444l93qfyn0pfqyl23c490h2vq82ypj-get.bash.drv
  /nix/store/lv0q1pfrdryf90dm7w01jh269njcqphm-hosts-vm.bash.drv
  /nix/store/zgpmy6yhh64p09rwxdl3vvni5zyl40bk-hosts-build.bash.drv
  /nix/store/zjna5lj0k2bggijckncvac0hv201lmlm-bud.drv
  /nix/store/98y21i5kjf0g01gzw7dr53izzlg7d6bc-devshell-dir.drv
  /nix/store/wkw4g6py2lngbzdgyjm0qlyh8gz2crip-nixos-entrypoint.drv
building '/nix/store/rbgwk3hd9xprwgjr9ndrwf1vdbsai3wc-fix-follows.diff.drv'...
building '/nix/store/0kr8sriwh2icrfjx8plx3yyhyf782v1h-unpack-anymap-0.12.1.drv'...
building '/nix/store/vpvzjadm2kp4ib94hpzzdwv359rh826w-source.drv'...

trying https://patch-diff.githubusercontent.com/raw/NixOS/nix/pull/4641.patch
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 14164    0 14164    0     0   100k      0 --:--:-- --:--:-- --:--:--  100k
hash mismatch in fixed-output derivation '/nix/store/avfapjldz0a50cc1g8ckr7s0786djnd7-fix-follows.diff':
  wanted: sha256:1ns60jk9w593xza8d4arggqk9yjpfb7fhf2yd36pixajbd5cq8lz
  got:    sha256:05r5icbxblm6ir73smpfjwca69w91aw1dkbk43a3v6454mpn04yk
cannot build derivation '/nix/store/0xmncxl92cw09w1cjl8adp3wbnl79wsn-nix-2.4pre20210707_02dd6bb.drv': 1 dependencies couldn't be built
building '/nix/store/57wm10yf5bxasyl8idz054sspwgdv1kr-unpack-atty-0.2.14.drv'...
building '/nix/store/7gqwbcp0gz0v6iqdzr93rp5pdccs421m-unpack-autocfg-1.0.1.drv'...
cannot build derivation '/nix/store/98y21i5kjf0g01gzw7dr53izzlg7d6bc-devshell-dir.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/wkw4g6py2lngbzdgyjm0qlyh8gz2crip-nixos-entrypoint.drv': 1 dependencies couldn't be built
error: build of '/nix/store/wkw4g6py2lngbzdgyjm0qlyh8gz2crip-nixos-entrypoint.drv' failed

Possible Solution

Steps to Reproduce

• See shell commands in log output above.
• I initially ran into this error with the quick start installer command before I turned to cloning the repo directly – same results.

Context

Unable to use nix-shell in the DevOS repo

Your Environment

Essentially a fresh NixOS configuration with some additions for Linode compatibility.

[mohe2015]

Anybody has a fix for this? I wanted to use this now but this is a blocker.

[nrdxp]

The follows fix is now in upstream nixpkgs and iirc should also be backported to the latest release. This patch should no longer be necessary at all. For now you should just be able to remove:
/~https://github.com/divnix/devos/blob/079adc4474231d5582fee5574bc5bcc6f133e5ac/flake.nix#L76

[FlorianFranzen]

The same happens when running nix develop github:divnix/devos. This seems to be fixed in digga, so I guess we are just waiting for a lock file update.

[Pacman99]

We're no longer patching nix, so this shouldn't be a problem anymore - I think!