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+Ce dossier contient un travail permettant de créer des dérivations qui
+vont toutes commencer par un préfix de taille et avec un nombre de
+composants donné (de la forme x/x/xxxxx)
+
+Le but étant de pouvoir copier une closure d’une dérivation, la mettre
+par exemple dans /opt/nix/store/....-foo et avec un simple `rename` +
+`sed` la rendre utilisable (dans l’exemple /nix/store/....-foo/xxx ->
+/opt/nix/store/....-foo).
+
+Ci dessous se trouvent des notes de ce que j’ai compris de la stack
+stdenv (pkgs/stdenv/linux/default.nix)
+
+# Stage -1
+  gcc-unwrapped = null
+  binutils = null
+  coreutils = null
+  gnugrep = null
+  `stagem1 = stdenv.__bootPackages.stdenv.__bootPackages.stdenv.__bootPackages.stdenv.__bootPackages.stdenv.__bootPackages.stdenv.__bootPackages`
+  -> contient cinq entrées (dont stdenv "invalide")
+
+# Stage 0
+  `stage0 = stdenv.__bootPackages.stdenv.__bootPackages.stdenv.__bootPackages.stdenv.__bootPackages.stdenv.__bootPackages`
+  (`stagem1 = stage0.stdenv.__bootPackages`)
+  `stage0.stdenv`
+  -> cc = null
+  `stage0`
+  overrides:
+    - glibc = extrait (ln -s) de bootstrapTools (bootstrap-stage0-glibc)
+    - gcc-unwrapped = bootstrapTools
+    - binutils = wrapper sur bootstrapTools (bootstrap-stage0-binutils-wrapper)
+    - coreutils = bootstrapTools
+    - gnugrep = bootstrapTools
+    - ccWrapperStdenv = stage0.stdenv
+
+# Stage 1
+  `stage1 = stdenv.__bootPackages.stdenv.__bootPackages.stdenv.__bootPackages.stdenv.__bootPackages`
+  (`stage0 = stage1.stdenv.__bootPackages`)
+  `stage1.stdenv`
+  -> cc = cc-wrapper buildé avec
+            cc = stage0.gcc-unwrapped = bootstrapTools
+            bintools = stage0.binutils = bootstrap-stage0-binutils-wrapper
+            glibc = stage0.glibc = bootstrap-stage0-glibc
+            coreutils = stage0.coreutils = bootstrapTools
+            gnugrep = stage0.gnugrep = bootstrapTools
+            stdenvNoCC = stage0.ccWrapperStdenv = stage0.stdenv
+  `stage1`
+  overrides:
+    - binutils-unwrapped = override (gold = false)
+    - ccWrapperStdenv = stage0.stdenv
+    - gcc-unwrapped = bootstrapTools
+    - coreutils = bootstrapTools
+    - gnugrep = bootstrapTools
+    - glibc = bootstrap-stage0-glibc
+    - perl = override (threading = false)
+
+# Stage 2
+  `stage2 = stdenv.__bootPackages.stdenv.__bootPackages.stdenv.__bootPackages`
+  (`stage1 = stage2.stdenv.__bootPackages`)
+  `stage2.stdenv`
+  -> cc = cc-wrapper buildé avec
+          cc = stage1.gcc-unwrapped = bootstrapTools
+          bintools = stage1.binutils = wrapper sur binutils-unwrapped (gold = false)
+          glibc = bootstrap-stage0-glibc
+          coreutils = bootstrapTools
+          gnugrep = bootstrapTools
+          stdenvNoCC = stage1.ccWrapperStdenv = stage0.stdenv
+  `stage2`
+  overrides:
+    - ccWrapperStdenv = stage0.stdenv
+    - gcc-unwrapped = bootstrapTools
+    - coreutils = bootstrapTools
+    - gnugrep = bootstrapTools
+    - perl = override (threading = false)
+    - binutils = stage1.override (libc = self.glibc)
+    - libidn2 = nuke-refs
+    - libunistring = nuke-refs
+    - dejagnu = nocheck
+    - gnum4 = stage1.gnum4
+    - bison = stage1.bison
+
+# Stage 3
+  `stage3 = stdenv.__bootPackages.stdenv.__bootPackages`
+  (`stage2 = stage3.stdenv.__bootPackages`)
+  `stage3.stdenv`
+  -> cc = cc-wrapper buildé avec
+          cc = stage2.gcc-unwrapped = bootstrapTools
+          bintools = stage2.binutils
+          glibc = stage2.glibc
+          coreutils = bootstrapTools
+          gnugrep = bootstrapTools
+          stdenvNoCC = stage2.ccWrapperStdenv = stage0.stdenv
+  `stage3`
+  overrides:
+    - ccWrapperStdenv = stage0.stdenv
+    - binutils = stage2.binutils
+    - coreutils = bootstrapTools
+    - gnugrep = bootstrapTools
+    - perl patchelf linuxHeaders gnum4 bison libidn2 libunistring = stage2
+    - glibc = stage2.glibc
+    - gmp mpfr libmpc isl_0_20 = override static
+    - gcc-unwrapped = override (isl)
+
+# Stage 4
+  `stage4 = stdenv.__bootPackages`
+  (`stage3 = stage4.stdenv.__bootPackages`)
+  `stage4.stdenv`
+  -> cc = cc-wrapper buildé avec
+          cc = stage3.gcc-unwrapped = override (isl)
+          bintools = stage2.binutils
+          glibc = stage2.glibc
+          coreutils = bootstrapTools
+          gnugrep = bootstrapTools
+          stdenvNoCC = stage3.ccWrapperStdenv = stage0.stdenv
+  `stage4`
+  overrides:
+    - gettext gnum4 bison gmp perl texinfo zlib linuxHeaders libidn2 libunistring = stage3
+    - glibc = stage3.glibc = stage2.glibc
+    - binutils = override
+    - gcc = buildé avec
+            cc = stage3.gcc-unwrapped
+            bintools = self.binutils
+            libc = self.glibc
+            stdenvNoCC coreutils gnugrep = self
+
+# Final Stage
+  `stdenv`
+  cc = stage4.gcc
+  `pkgs`
+  overrides:
+    - glibc = stage4.glibc = stage2.glibc
+    - zlib libidn2 libunistring = stage4 = stage3
+    - (hors cross-compile) binutils binutils-unwrapped = stage4
+    - (hors cross-compile) gcc = cc