[Nix-dev] Somewhat startling output by nix-shell in master

[Kosyrev Serge]

Good time of day folks!

Here's what I've just noticed on the master branch --
make note of the relationship between the promised and the actually built drv hashes/paths:

,----
| [deepfire at andromedae:~/src/moodel]$ nix-shell
| these derivations will be built:
|   /nix/store/3ihx02bx2j2y9fngyskjwpf4ysnb870a-glibc-locales-2.21.drv
|   /nix/store/mkgkngpwnchjx9y9cnxh8rwc16fxrj2l-hscolour-1.23.drv
|   /nix/store/4x7x62lbapbr8xkpz2av3zbj25giz02f-haskell-hostname-1.0.drv
|   /nix/store/5jnfb1j8a3p57jfv9r36px453sr13sja-haskell-text-1.2.1.1.drv
|   /nix/store/5l59d5g9gvl9j9fc8za14hgcahh8vmpz-haskell-ansi-terminal-0.6.2.1.drv
|   /nix/store/acdj4n6fpgyim0gxn6qld2mygvil5x3p-haskell-xml-1.3.14.drv
|   /nix/store/l7dg911nqiw2886xlnl2kxy77bcpq985-haskell-random-1.1.drv
|   /nix/store/nrcm70782p2rpz0fxhrmfr44f2hj7rqk-haskell-ansi-wl-pprint-0.6.7.2.drv
|   /nix/store/6gqp5f1lhmd172gniif718gplxc5clgs-haskell-Cabal-1.20.0.3.drv
|   /nix/store/h6sjn5hv696v730vanlknnjf9s98xyj9-jailbreak-cabal-1.3.drv
|   /nix/store/cj1cssa34xyhxyrim26awgm8m7hwqwd5-haskell-mtl-2.1.3.1.drv
|   /nix/store/qs1jhl3326z4xr8x040fb5jwx98wwc7f-haskell-regex-base-0.93.2.drv
|   /nix/store/zr4ysr377klp13vq7yl8p6fpahcn2m3w-haskell-regex-posix-0.95.2.drv
|   /nix/store/ic2hq15ag5ldr225lmip1ga5xa2jcf0s-haskell-test-framework-0.8.1.1.drv
|   /nix/store/ny5k5341mgl4inll3qpnrnsa8hr54hly-haskell-primitive-0.6.drv
|   /nix/store/ws9p49nnvz4jmx91c7y3mcd2iz8qb4i5-haskell-tf-random-0.5.drv
|   /nix/store/dx1914fgw05qdgq930za7vdkaid37hg8-haskell-QuickCheck-2.8.1.drv
|   /nix/store/m0qvsj8hsxbvm2f20r0z4b86vngb5253-happy-1.19.5.drv
|   /nix/store/626x9b5kzb48k25srmrcqi5ij16pajah-alex-3.1.4.drv
|   /nix/store/s0w79kzyhafshf88klyl48hfwahzfmr2-ghc-nokinds-7.11.20150718.drv
|   /nix/store/6dwih1cgv8qg9i053yf9dscd68dsighr-hscolour-1.23.drv
|   /nix/store/k2d1pkbjks4mlzz8g5sap1xzjrxmlc83-haskell-base-unicode-symbols-0.2.2.4.drv
|   /nix/store/ivlvca95yp7ynix9xl1n1kybfaarmbhy-ghc-nokinds-7.11.20150718.drv
| building path(s) ‘/nix/store/gvap95wg2qvi6bq730i6nzn5n2zqf9z9-glibc-locales-2.21’
| building path(s) ‘/nix/store/p0pzc8fqbhxll4kplrjp8ls9l094cbik-hscolour-1.23’
| building path(s) ‘/nix/store/0l3j1yk1j1w4vxkkwpkl7g0422rvg7h3-haskell-Cabal-1.20.0.3’
| building path(s) ‘/nix/store/d75pakhx40i4pvz9k8v6223sjrfs24ic-haskell-ansi-terminal-0.6.2.1’
| building path(s) ‘/nix/store/pysypgs1ndi1skkg38lmfn8w8cyy0r6j-haskell-hostname-1.0’
| building path(s) ‘/nix/store/g7rphbk0cjnsm7wh2q63g4ys80c5gk49-haskell-primitive-0.6’
| building path(s) ‘/nix/store/xqp6c9dzkhf2i4agh07aikq3w2hlxlck-haskell-random-1.1’
| building path(s) ‘/nix/store/gy8zazh7bdrnk8qicj47rv27x4l70zp5-haskell-text-1.2.1.1’
| building path(s) ‘/nix/store/yw81bg13hqjxzw8mrhldz270j214ammd-haskell-ansi-wl-pprint-0.6.7.2’
| building path(s) ‘/nix/store/b2v86pzfgd668qz4z630qkda7jxf1028-haskell-tf-random-0.5’
| building path(s) ‘/nix/store/fpiral6b2gbx8zii2nzi1msgx6469aia-haskell-xml-1.3.14’
| building path(s) ‘/nix/store/x7s7syj9ap77rhc7pp458462vdczjaxa-jailbreak-cabal-1.3’
| building path(s) ‘/nix/store/52snfaknl9vqf0cnj50kv4pz3hky3990-haskell-mtl-2.1.3.1’
| building path(s) ‘/nix/store/843bnhyq41m1bjyswz65s1bxc7r0dmd7-happy-1.19.5’
| building path(s) ‘/nix/store/5y6qbg0r9vljq3r5fjlwmm8jrj11nk85-haskell-regex-base-0.93.2’
| building path(s) ‘/nix/store/2maa6zxa6pdsv17lnsf8pp25w8gr72jb-haskell-regex-posix-0.95.2’
| building path(s) ‘/nix/store/h8qn0fw6qn6c1wlwp23fbgp8v45hsrcl-haskell-test-framework-0.8.1.1’
| building path(s) ‘/nix/store/2p6kz7605i0jqlsqsh7vbbcbcqn959c1-haskell-QuickCheck-2.8.1’
| building path(s) ‘/nix/store/9qz2wfgqin4g2sm3j5bz0n0mhb3vk6mp-alex-3.1.4’
| building path(s) ‘/nix/store/aaxn6isjl27xypj3rfqhbr2if2sb3i51-ghc-nokinds-7.11.20150718’
`----

..I'm not pasting my shell.nix / default.nix, for I believe them to be
pedestrian enough not to be relevant.

Am I.. correct for being startled by this?

-- 
regards,
Косырев Серёга
-- 
“And those who were seen dancing were thought to be insane
 by those who could not hear the music.”
 – Friedrich Wilhelm Nietzsche