these 35 derivations will be built: /nix/store/mjwdgvkawqbrpv278am8gasb8iac66x0-boost-1.89.0.drv /nix/store/1mykwcx85a68r3k38dwzp8gps1z6sksb-nix-util-2.36.0pre.drv /nix/store/9n17dgkzhinrclqybgygb910xk58al7w-nix-store-2.36.0pre.drv /nix/store/rn1nmk4sanvzy6gr0vfhl4hzqk0grdcx-nix-fetchers-2.36.0pre.drv /nix/store/xw8xddvy0ic36jl6d2lsfd5akwfwf6pg-nix-expr-2.36.0pre.drv /nix/store/1igfi8hm58k1zmscl8f1awy6gmbq30rh-nix-flake-2.36.0pre.drv /nix/store/97armq2k3ln28h7h1wxll8r2blq5hqh6-nix-util-c-2.36.0pre.drv /nix/store/4q6m3ssks0dny2kh40bj0yi97jrhc89b-nix-store-c-2.36.0pre.drv /nix/store/d5iyivf6gf4iag4mb4i30r9m2dfv1hdn-nix-expr-c-2.36.0pre.drv /nix/store/6gs7j5p6brr1rvzhc5p1xa7zfa7ls8f9-nix-util-test-support-2.36.0pre.drv /nix/store/p2f2n9s23s6p2vgnwxrdbazk21yay5in-nix-store-test-support-2.36.0pre.drv /nix/store/dfnns6i70l7f9nnc7qv2m8fvdj5zw1g0-nix-util-test-support-2.36.0pre.drv /nix/store/a7ijn9m1izfxhkfzfvgpkpsadpzv2dl8-nix-fetchers-c-2.36.0pre.drv /nix/store/ds4amh7ll8815mpw93xdhbk748d0a7r4-nix-flake-c-2.36.0pre.drv /nix/store/0f776mij24a3zspxs5a5sx0af3alyg9b-nix-flake-tests-2.36.0pre.drv /nix/store/lk6nabg2dxkrz3lcywlwb29bmq51x1q6-nix-main-2.36.0pre.drv /nix/store/0pxw59f05wy29nndzvsr4namjg6d0il8-nix-cmd-2.36.0pre.drv /nix/store/a6144nwg8xzg5v2ml4hhd1pwcx2n14ck-nix-grpc-store-asan-0.1.0.drv /nix/store/zd0i46kb4d1l2fpw2xfkwf3s93bwxbws-nix-fetchers-tests-2.36.0pre.drv /nix/store/46clhjkx6il6mdxyqwlfdkmj1h245s0p-nix-fetchers-tests-run.drv /nix/store/5c6drff7gk289kzd76gb9pg934i37v4m-nix-main-c-2.36.0pre.drv /nix/store/26js7rah5r77ad20p6kfci42ach1y5pq-nix-store-tests-2.36.0pre.drv /nix/store/67mr7x6dqwp2ywx76d6knf8aa3nqjhf4-nix-store-tests-run.drv /nix/store/nxj22gwrjyskip7z9k7rb8fgjgpi9yh1-nix-2.36.0pre20260726_cd1729d.drv /nix/store/7xlrrv5dqch30cclmpyq1m2gacdy3l54-nix-manual-2.36.0pre20260726_cd1729d.drv /nix/store/f680x949v6w4y5cbz38k32rxm2x6ciad-nix-nswrapper-2.36.0pre.drv /nix/store/cirnri5cxln8zv583x55mgy2p0gj8a5i-nix-util-tests-2.36.0pre.drv /nix/store/hcm0iyfzfki24jpbipsxqbij8jmz92lh-nix-util-tests-run.drv /nix/store/mn0n8p9x3b76q0fnyn47jndqs6ia7ya4-nix-flake-tests-run.drv /nix/store/qgh9yw5zc613i6h8w0yddq69smxcldk8-nix-util-tests-run-without-new-syscalls.drv /nix/store/xg7hypd1j4qj9nnqi73cmp1xv0znjv13-nix-expr-tests-2.36.0pre.drv /nix/store/rhwnjzfdgsq0vn7bpdbb3p7mackc7ppq-nix-expr-tests-run.drv /nix/store/v3rjszdxcmk0dsgs1l00p6q7r138809f-nix-functional-tests-2.36.0pre20260726_cd1729d.drv /nix/store/p5gv5mhf3lszgccb7c2n9x670n12g4jh-nix-2.36.0pre20260726_cd1729d.drv /nix/store/1cyfpcfgff5137dxqnxkd6i812vmwqva-nix-grpc-store-sanitize-smoke.drv Failed to find a machine for remote build! derivation: mjwdgvkawqbrpv278am8gasb8iac66x0-boost-1.89.0.drv required (system, features): (aarch64-linux, []) 1 available machines: (systems, maxjobs, supportedFeatures, mandatoryFeatures) ([aarch64-darwin, x86_64-darwin], 8, [big-parallel, recursive-nix], []) building '/nix/store/mjwdgvkawqbrpv278am8gasb8iac66x0-boost-1.89.0.drv' boost-1.89.0> tribuchet: building on eliza boost-1.89.0> structuredAttrs is enabled boost-1.89.0> Running phase: unpackPhase boost-1.89.0> unpacking source archive /nix/store/dcv7x77m23r3bvz693h7bfcybcz3z990-boost_1_89_0.tar.bz2 boost-1.89.0> source root is boost_1_89_0 boost-1.89.0> setting SOURCE_DATE_EPOCH to timestamp 1754508366 of file "boost_1_89_0/libs/libraries.htm" boost-1.89.0> unpackPhase completed in 30 seconds boost-1.89.0> Running phase: patchPhase boost-1.89.0> applying patch /nix/store/8h4hjjl3i7d9bd34kbfdy1g7iayfawjs-0001-Fix-uncaught_exceptions-not-accounting-for-forced_un.patch boost-1.89.0> patching file boost/context/fiber_fcontext.hpp boost-1.89.0> applying patch /nix/store/nqcgx0yh813rr6xryx3ykxwx3xjl8zc6-cmake-paths-188.patch boost-1.89.0> patching file tools/boost_install/boost-install.jam boost-1.89.0> applying patch /nix/store/y7iqqxh5skv2aas04nb0c1cpdp7sfgws-0921b9fd5c776aec7748475c6c10807e0d51bc6d.patch boost-1.89.0> patching file boost/context/fiber_fcontext.hpp boost-1.89.0> Hunk #1 FAILED at 87. boost-1.89.0> 1 out of 1 hunk FAILED -- saving rejects to file boost/context/fiber_fcontext.hpp.rej error: Cannot build '/nix/store/mjwdgvkawqbrpv278am8gasb8iac66x0-boost-1.89.0.drv'. Reason: builder failed with exit code 1. Output paths: /nix/store/s3kj3f4wpykqs2jis099asx2im3xd30q-boost-1.89.0-dev /nix/store/w30z8hx25k104liqf4hswj0675bsghg5-boost-1.89.0 Last 16 log lines: > tribuchet: building on eliza > structuredAttrs is enabled > Running phase: unpackPhase > unpacking source archive /nix/store/dcv7x77m23r3bvz693h7bfcybcz3z990-boost_1_89_0.tar.bz2 > source root is boost_1_89_0 > setting SOURCE_DATE_EPOCH to timestamp 1754508366 of file "boost_1_89_0/libs/libraries.htm" > unpackPhase completed in 30 seconds > Running phase: patchPhase > applying patch /nix/store/8h4hjjl3i7d9bd34kbfdy1g7iayfawjs-0001-Fix-uncaught_exceptions-not-accounting-for-forced_un.patch > patching file boost/context/fiber_fcontext.hpp > applying patch /nix/store/nqcgx0yh813rr6xryx3ykxwx3xjl8zc6-cmake-paths-188.patch > patching file tools/boost_install/boost-install.jam > applying patch /nix/store/y7iqqxh5skv2aas04nb0c1cpdp7sfgws-0921b9fd5c776aec7748475c6c10807e0d51bc6d.patch > patching file boost/context/fiber_fcontext.hpp > Hunk #1 FAILED at 87. > 1 out of 1 hunk FAILED -- saving rejects to file boost/context/fiber_fcontext.hpp.rej For full logs, run: nix log /nix/store/mjwdgvkawqbrpv278am8gasb8iac66x0-boost-1.89.0.drv error: Cannot build '/nix/store/1mykwcx85a68r3k38dwzp8gps1z6sksb-nix-util-2.36.0pre.drv'. Reason: 1 dependency failed. Output paths: /nix/store/71wln404240p8234s95crkhk2ijci7z0-nix-util-2.36.0pre-dev /nix/store/ii6kf6dqp74a1a6vv85rbwg4vsdpg2r2-nix-util-2.36.0pre-debug /nix/store/xg9qfdcp0agzslvzaj4hdgjz84mj7zip-nix-util-2.36.0pre error: Cannot build '/nix/store/f680x949v6w4y5cbz38k32rxm2x6ciad-nix-nswrapper-2.36.0pre.drv'. Reason: 1 dependency failed. Output paths: /nix/store/8c5776zxfrlw6ypgz4hypnskrk0mhy0m-nix-nswrapper-2.36.0pre /nix/store/988bb9jp2c147jqg7h8izgqn3l9sq02z-nix-nswrapper-2.36.0pre-debug error: Cannot build '/nix/store/9n17dgkzhinrclqybgygb910xk58al7w-nix-store-2.36.0pre.drv'. Reason: 2 dependencies failed. Output paths: /nix/store/c0anl6blnf84s0sp8j3kz43n7v0xyizh-nix-store-2.36.0pre /nix/store/gvaq1jh8zpjdqv210c9zdr7j393a6wxx-nix-store-2.36.0pre-dev /nix/store/var4idd52gc1glf82y61dqzx3js00992-nix-store-2.36.0pre-debug error: Cannot build '/nix/store/97armq2k3ln28h7h1wxll8r2blq5hqh6-nix-util-c-2.36.0pre.drv'. Reason: 1 dependency failed. Output paths: /nix/store/1r1sabb7mg9m0f04r1s0j8g85rbk2w2y-nix-util-c-2.36.0pre-dev /nix/store/f8l6p3rzjr1q62911dvf5lkrrvqrh51p-nix-util-c-2.36.0pre /nix/store/hb211cnhjcrzrrm9bjmsp08cmmkl2pwl-nix-util-c-2.36.0pre-debug error: Cannot build '/nix/store/rn1nmk4sanvzy6gr0vfhl4hzqk0grdcx-nix-fetchers-2.36.0pre.drv'. Reason: 2 dependencies failed. Output paths: /nix/store/13w5s154mbh5vc8d5dfwi1x6r796z3y4-nix-fetchers-2.36.0pre-dev /nix/store/fdchxrwnxmvlh8nk9v4dsg95z4nwrh00-nix-fetchers-2.36.0pre-debug /nix/store/ig6vmar3nab3hy27k9y39svnx0p7zch9-nix-fetchers-2.36.0pre error: Cannot build '/nix/store/a6144nwg8xzg5v2ml4hhd1pwcx2n14ck-nix-grpc-store-asan-0.1.0.drv'. Reason: 2 dependencies failed. Output paths: /nix/store/x0n8l9fvhqki9kyn5xm5g12fagc7f14j-nix-grpc-store-asan-0.1.0 error: Cannot build '/nix/store/4q6m3ssks0dny2kh40bj0yi97jrhc89b-nix-store-c-2.36.0pre.drv'. Reason: 2 dependencies failed. Output paths: /nix/store/ax3bdi606khgz2b7i2qfwy74j5xalk50-nix-store-c-2.36.0pre-debug /nix/store/djn4njwm8sdcwwh26jk7k34jgpngh0ca-nix-store-c-2.36.0pre-dev /nix/store/ri276clmydxziipisx8ry0g1pzsrljxm-nix-store-c-2.36.0pre error: Cannot build '/nix/store/6gs7j5p6brr1rvzhc5p1xa7zfa7ls8f9-nix-util-test-support-2.36.0pre.drv'. Reason: 2 dependencies failed. Output paths: /nix/store/ijvziy08jjg543kj3l30g4jkch27hpx9-nix-util-test-support-2.36.0pre-dev /nix/store/k6pgiry6278ps5nq7lx7m0cjqq7ifnrf-nix-util-test-support-2.36.0pre /nix/store/z026ds9x4y4d1z7x5mn7m0cm6lvrl9x3-nix-util-test-support-2.36.0pre-debug error: Cannot build '/nix/store/xw8xddvy0ic36jl6d2lsfd5akwfwf6pg-nix-expr-2.36.0pre.drv'. Reason: 4 dependencies failed. Output paths: /nix/store/879d05h8dz9djrb40849phan2rg4ca8a-nix-expr-2.36.0pre /nix/store/a8yyrx4smcqqqpf312g68i4jxf32fsnm-nix-expr-2.36.0pre-dev /nix/store/cm04crv118630wdjamq5damlfi43giy6-nix-expr-2.36.0pre-debug error: Cannot build '/nix/store/p2f2n9s23s6p2vgnwxrdbazk21yay5in-nix-store-test-support-2.36.0pre.drv'. Reason: 3 dependencies failed. Output paths: /nix/store/1fca5b7fb8x8jrb1vgfln70kjjar276x-nix-store-test-support-2.36.0pre-dev /nix/store/40xffmjachf5p1lhb0nj5gc4aqvywdi8-nix-store-test-support-2.36.0pre-debug /nix/store/4xbd9529z0dlg6g1m08b4z3zynqcchvn-nix-store-test-support-2.36.0pre error: Cannot build '/nix/store/cirnri5cxln8zv583x55mgy2p0gj8a5i-nix-util-tests-2.36.0pre.drv'. Reason: 3 dependencies failed. Output paths: /nix/store/j91ryjfkncpsvn9bxvi805synxg06kdq-nix-util-tests-2.36.0pre-debug /nix/store/sbahps4k168xgl9p3dzqbcsrd6qhdfml-nix-util-tests-2.36.0pre error: Cannot build '/nix/store/d5iyivf6gf4iag4mb4i30r9m2dfv1hdn-nix-expr-c-2.36.0pre.drv'. Reason: 2 dependencies failed. Output paths: /nix/store/dcn11jwda33y6ddv4si2p2lm458y95p6-nix-expr-c-2.36.0pre-debug /nix/store/ldlr08dypsrh3l1rm1mvrys32aypv64w-nix-expr-c-2.36.0pre-dev /nix/store/v6lqy3cql4ww1px7p5smz3lpvnrlv58w-nix-expr-c-2.36.0pre error: Cannot build '/nix/store/1igfi8hm58k1zmscl8f1awy6gmbq30rh-nix-flake-2.36.0pre.drv'. Reason: 4 dependencies failed. Output paths: /nix/store/2n4j6xwy5and3nwhdhm4d7bk732s28jd-nix-flake-2.36.0pre-dev /nix/store/dzk40a9389xhk22747y0wfjnsbxqrmc5-nix-flake-2.36.0pre-debug /nix/store/jfcb35fab5ch4cknlrrhskcd7mgvwz6c-nix-flake-2.36.0pre error: Cannot build '/nix/store/lk6nabg2dxkrz3lcywlwb29bmq51x1q6-nix-main-2.36.0pre.drv'. Reason: 3 dependencies failed. Output paths: /nix/store/d46ncgklcjz3ys8yx547qxw43fqxvk3s-nix-main-2.36.0pre-debug /nix/store/ns9xz4mfxxz74kqnjxwsxvc0z44lqm4q-nix-main-2.36.0pre-dev /nix/store/pvh87n4ykwq3g76gk6ia3cbsnnnqkvw1-nix-main-2.36.0pre error: Cannot build '/nix/store/26js7rah5r77ad20p6kfci42ach1y5pq-nix-store-tests-2.36.0pre.drv'. Reason: 3 dependencies failed. Output paths: /nix/store/4yych1zkzhagfv0y3bzch73x3jbgjjq3-nix-store-tests-2.36.0pre /nix/store/bqnrdg5pdpa5jsaag0c7341l2hama1fs-nix-store-tests-2.36.0pre-debug error: Cannot build '/nix/store/qgh9yw5zc613i6h8w0yddq69smxcldk8-nix-util-tests-run-without-new-syscalls.drv'. Reason: 1 dependency failed. Output paths: /nix/store/rhi68g70nmchx0000hziar62y8dss1gk-nix-util-tests-run-without-new-syscalls error: Cannot build '/nix/store/hcm0iyfzfki24jpbipsxqbij8jmz92lh-nix-util-tests-run.drv'. Reason: 1 dependency failed. Output paths: /nix/store/hg51p0h5if9m4kis87dg5z88l4jap3cl-nix-util-tests-run error: Cannot build '/nix/store/0pxw59f05wy29nndzvsr4namjg6d0il8-nix-cmd-2.36.0pre.drv'. Reason: 6 dependencies failed. Output paths: /nix/store/9fvkqx4nabccw9kihjrd80dzsq4k5wi5-nix-cmd-2.36.0pre-dev /nix/store/is41amhkgzl1zsspvfgw8695mx4yldv6-nix-cmd-2.36.0pre-debug /nix/store/wdw6gaq58s0xnfg2b5vdysybv3vsp6p2-nix-cmd-2.36.0pre error: Cannot build '/nix/store/a7ijn9m1izfxhkfzfvgpkpsadpzv2dl8-nix-fetchers-c-2.36.0pre.drv'. Reason: 4 dependencies failed. Output paths: /nix/store/054jz0gv5r32lisrd2667h64p71hdi9m-nix-fetchers-c-2.36.0pre /nix/store/0vmnb29p5383xn5c4jdlascsy5kic90g-nix-fetchers-c-2.36.0pre-debug /nix/store/vyi33g4mmi0zadpc6d7mdgv53dwvvx7k-nix-fetchers-c-2.36.0pre-dev error: Cannot build '/nix/store/5c6drff7gk289kzd76gb9pg934i37v4m-nix-main-c-2.36.0pre.drv'. Reason: 4 dependencies failed. Output paths: /nix/store/2sa1my4wx3hwy7lsyyz0200srdw0j3xg-nix-main-c-2.36.0pre-debug /nix/store/rw2dj7dxpsxzy6nk5fwcwzjlba7hxj74-nix-main-c-2.36.0pre /nix/store/s6i3mdm8rmiyc9y0xd5rmr3ksy14vhy5-nix-main-c-2.36.0pre-dev error: Cannot build '/nix/store/67mr7x6dqwp2ywx76d6knf8aa3nqjhf4-nix-store-tests-run.drv'. Reason: 1 dependency failed. Output paths: /nix/store/xgrxz4qjykkaqj5mams5p5kda8v7aqib-nix-store-tests-run error: Cannot build '/nix/store/dfnns6i70l7f9nnc7qv2m8fvdj5zw1g0-nix-util-test-support-2.36.0pre.drv'. Reason: 3 dependencies failed. Output paths: /nix/store/690g2z4rjw1lwp16q97z7q55wjr3d89v-nix-util-test-support-2.36.0pre-dev /nix/store/gilshcc7an2gnfa0qb9wwkmn33cmxjkn-nix-util-test-support-2.36.0pre /nix/store/rk2qf6hymi7ald7dni51jn1bhnxqpakx-nix-util-test-support-2.36.0pre-debug error: Cannot build '/nix/store/xg7hypd1j4qj9nnqi73cmp1xv0znjv13-nix-expr-tests-2.36.0pre.drv'. Reason: 3 dependencies failed. Output paths: /nix/store/7irbmx6x44nxf2kzaz5rwm12b1lagvnj-nix-expr-tests-2.36.0pre /nix/store/l0x875wy6kbkfbpv1wnhk62x4zbpfgd1-nix-expr-tests-2.36.0pre-debug error: Cannot build '/nix/store/zd0i46kb4d1l2fpw2xfkwf3s93bwxbws-nix-fetchers-tests-2.36.0pre.drv'. Reason: 3 dependencies failed. Output paths: /nix/store/a16qd3kkijbayp0dmq5qcn0bc03jliz3-nix-fetchers-tests-2.36.0pre /nix/store/wd8dw26bbc7scksjvxwqs8c0h087h3al-nix-fetchers-tests-2.36.0pre-debug error: Cannot build '/nix/store/ds4amh7ll8815mpw93xdhbk748d0a7r4-nix-flake-c-2.36.0pre.drv'. Reason: 4 dependencies failed. Output paths: /nix/store/5wccdf21iglcvcxjm5c2bdr1vfm6cnpb-nix-flake-c-2.36.0pre-dev /nix/store/jrr6pp4pyaxzyybhzk85bli8mhnl3dz6-nix-flake-c-2.36.0pre-debug /nix/store/l0i6sww79n7pgkcg8wyisb900zm7pf8f-nix-flake-c-2.36.0pre error: Cannot build '/nix/store/nxj22gwrjyskip7z9k7rb8fgjgpi9yh1-nix-2.36.0pre20260726_cd1729d.drv'. Reason: 10 dependencies failed. Output paths: /nix/store/427rs6bbpw7k61byyv6l05qq3gmh4nnr-nix-2.36.0pre20260726_cd1729d /nix/store/av302cfx3xlp4jwbsfjyx7qh3g9hz9x0-nix-2.36.0pre20260726_cd1729d-debug error: Cannot build '/nix/store/rhwnjzfdgsq0vn7bpdbb3p7mackc7ppq-nix-expr-tests-run.drv'. Reason: 1 dependency failed. Output paths: /nix/store/pi538z9wq7vlnq2wcn01sm7iyly06z1b-nix-expr-tests-run error: Cannot build '/nix/store/46clhjkx6il6mdxyqwlfdkmj1h245s0p-nix-fetchers-tests-run.drv'. Reason: 1 dependency failed. Output paths: /nix/store/3vc8hcl77fk5lrxxl4swm9lh1jx1izyq-nix-fetchers-tests-run error: Cannot build '/nix/store/0f776mij24a3zspxs5a5sx0af3alyg9b-nix-flake-tests-2.36.0pre.drv'. Reason: 3 dependencies failed. Output paths: /nix/store/5jq476wqfba5cdgx9fw0676r81c8rbv5-nix-flake-tests-2.36.0pre-debug /nix/store/wpwc9srf2bs5nm1s8y1xzjnw0f0d726m-nix-flake-tests-2.36.0pre error: Cannot build '/nix/store/mn0n8p9x3b76q0fnyn47jndqs6ia7ya4-nix-flake-tests-run.drv'. Reason: 1 dependency failed. Output paths: /nix/store/3w1fx8jjsrv53vdaadvsw8bp0zvhggv7-nix-flake-tests-run error: Cannot build '/nix/store/v3rjszdxcmk0dsgs1l00p6q7r138809f-nix-functional-tests-2.36.0pre20260726_cd1729d.drv'. Reason: 3 dependencies failed. Output paths: /nix/store/b161557krrp2z16q5svdvrrrnmnn72b3-nix-functional-tests-2.36.0pre20260726_cd1729d error: Cannot build '/nix/store/7xlrrv5dqch30cclmpyq1m2gacdy3l54-nix-manual-2.36.0pre20260726_cd1729d.drv'. Reason: 1 dependency failed. Output paths: /nix/store/h86lxcdyh5ccipiwljhc0jq5j8qhny5v-nix-manual-2.36.0pre20260726_cd1729d /nix/store/s6gn1zjwf1wkllv5p7mc8720h9da0g1j-nix-manual-2.36.0pre20260726_cd1729d-man error: Cannot build '/nix/store/7xlrrv5dqch30cclmpyq1m2gacdy3l54-nix-manual-2.36.0pre20260726_cd1729d.drv'. Reason: 1 dependency failed. Output paths: /nix/store/h86lxcdyh5ccipiwljhc0jq5j8qhny5v-nix-manual-2.36.0pre20260726_cd1729d /nix/store/s6gn1zjwf1wkllv5p7mc8720h9da0g1j-nix-manual-2.36.0pre20260726_cd1729d-man error: Cannot build '/nix/store/p5gv5mhf3lszgccb7c2n9x670n12g4jh-nix-2.36.0pre20260726_cd1729d.drv'. Reason: 24 dependencies failed. Output paths: /nix/store/ljhzkv35v89kzlcsa4wz9xpayqm37rai-nix-2.36.0pre20260726_cd1729d-man /nix/store/lm8gxm5mklzalkbfkn14dq37rakvh6v2-nix-2.36.0pre20260726_cd1729d /nix/store/wr9rvmg9kg6z68pjw6yjz4rh67b7vyfa-nix-2.36.0pre20260726_cd1729d-doc /nix/store/y1hc0hmwkv8i04i8nwnjbxxxv76z0s6j-nix-2.36.0pre20260726_cd1729d-dev error: Cannot build '/nix/store/1cyfpcfgff5137dxqnxkd6i812vmwqva-nix-grpc-store-sanitize-smoke.drv'. Reason: 2 dependencies failed. Output paths: /nix/store/cbvhz8mrp67h3lmdbvrc5dbmr4indxz0-nix-grpc-store-sanitize-smoke