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authorMaxim Cournoyer <maxim.cournoyer@gmail.com>2021-02-22 08:55:39 -0500
committerMaxim Cournoyer <maxim.cournoyer@gmail.com>2021-03-15 18:00:35 -0400
commit77c2f4e2068ebec3f384c826c5a99785125ff72c (patch)
tree2c57f079117b57441e63cf8e95d8af2031f04293 /gnu/services
parentd184fd42165a72221a1762dbb8651ff81534ac8c (diff)
downloadguix-77c2f4e2068ebec3f384c826c5a99785125ff72c.tar
guix-77c2f4e2068ebec3f384c826c5a99785125ff72c.tar.gz
services/qemu-binfmt: Use the F flag and the static output of QEMU.
Fixes <https://issues.guix.gnu.org/36117>. Before this change, the 'binfmt_misc' entries registered for QEMU would not be usable in container contexts outside of guix-daemon (without manually bind mounting file names). For example: $ docker run --rm arm32v7/debian true standard_init_linux.go:207: exec user process caused "no such file or directory" After this change, any container can make use of the QEMU binfmt_misc registrations, as their corresponding QEMU static binaries are fully pre-loaded by the kernel. * gnu/services/virtualization.scm (<qemu-platform>): Define using 'define-record-type*'. [flags]: New field, which defaults to "F" (fix binary). (%i386, %i486, %alpha, %arm, %armeb, %sparc, %sparc32plus, %ppc, %ppc64) (%ppc64le, %m68k, %mips, %mipsel, %mipsn32, %mipsn32el, %mips64, %mips64el) (%riscv32, %riscv64, %sh4, %sh4eb, %s390x, %aarch64, %hppa): Adjust. (qemu-binfmt-guix-chroot): Remove variable. (qemu-binfmt-service-type): Remove the qemu-binfmt-guix-chroot extension. * gnu/services/qemu-binfmt (qemu-platform->binfmt): Use the static output of QEMU. * doc/contributing.texi (Submitting Patches): Update doc. * doc/guix.texi (Virtualization Services): Update doc.
Diffstat (limited to 'gnu/services')
-rw-r--r--gnu/services/virtualization.scm227
1 files changed, 129 insertions, 98 deletions
diff --git a/gnu/services/virtualization.scm b/gnu/services/virtualization.scm
index a45da14a80..36e9feb05c 100644
--- a/gnu/services/virtualization.scm
+++ b/gnu/services/virtualization.scm
@@ -554,13 +554,14 @@ potential infinite waits blocking libvirt."))
;;;
;; Platforms that QEMU can emulate.
-(define-record-type <qemu-platform>
- (qemu-platform name family magic mask)
+(define-record-type* <qemu-platform>
+ qemu-platform make-qemu-platform
qemu-platform?
(name qemu-platform-name) ;string
(family qemu-platform-family) ;string
(magic qemu-platform-magic) ;bytevector
- (mask qemu-platform-mask)) ;bytevector
+ (mask qemu-platform-mask) ;bytevector
+ (flags qemu-platform-flags (default "F"))) ;string
(define-syntax bv
(lambda (s)
@@ -577,125 +578,173 @@ potential infinite waits blocking libvirt."))
;;; 'scripts/qemu-binfmt-conf.sh' in QEMU.
(define %i386
- (qemu-platform "i386" "i386"
- (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00")
- (bv "\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff")))
+ (qemu-platform
+ (name "i386")
+ (family "i386")
+ (magic (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00"))
+ (mask (bv "\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
(define %i486
- (qemu-platform "i486" "i386"
- (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00")
- (bv "\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff")))
+ (qemu-platform
+ (name "i486")
+ (family "i386")
+ (magic (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00"))
+ (mask (bv "\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
(define %alpha
- (qemu-platform "alpha" "alpha"
- (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90")
- (bv "\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff")))
+ (qemu-platform
+ (name "alpha")
+ (family "alpha")
+ (magic (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90"))
+ (mask (bv "\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
(define %arm
- (qemu-platform "arm" "arm"
- (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff")))
+ (qemu-platform
+ (name "arm")
+ (family "arm")
+ (magic (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
(define %armeb
- (qemu-platform "armeb" "arm"
- (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff")))
+ (qemu-platform
+ (name "armeb")
+ (family "arm")
+ (magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
(define %sparc
- (qemu-platform "sparc" "sparc"
- (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02")
- (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff")))
+ (qemu-platform
+ (name "sparc")
+ (family "sparc")
+ (magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
(define %sparc32plus
- (qemu-platform "sparc32plus" "sparc"
- (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x12")
- (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff")))
+ (qemu-platform
+ (name "sparc32plus")
+ (family "sparc")
+ (magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x12"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
(define %ppc
- (qemu-platform "ppc" "ppc"
- (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff")))
+ (qemu-platform
+ (name "ppc")
+ (family "ppc")
+ (magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
(define %ppc64
- (qemu-platform "ppc64" "ppc"
- (bv "\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff")))
+ (qemu-platform
+ (name "ppc64")
+ (family "ppc")
+ (magic (bv "\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
(define %ppc64le
- (qemu-platform "ppc64le" "ppcle"
- (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15\x00")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\x00")))
+ (qemu-platform
+ (name "ppc64le")
+ (family "ppcle")
+ (magic (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15\x00"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\x00"))))
(define %m68k
- (qemu-platform "m68k" "m68k"
- (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04")
- (bv "\xff\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff")))
+ (qemu-platform
+ (name "m68k")
+ (family "m68k")
+ (magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
;; XXX: We could use the other endianness on a MIPS host.
(define %mips
- (qemu-platform "mips" "mips"
- (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff")))
+ (qemu-platform
+ (name "mips")
+ (family "mips")
+ (magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
(define %mipsel
- (qemu-platform "mipsel" "mips"
- (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff")))
+ (qemu-platform
+ (name "mipsel")
+ (family "mips")
+ (magic (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
(define %mipsn32
- (qemu-platform "mipsn32" "mips"
- (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff")))
+ (qemu-platform
+ (name "mipsn32")
+ (family "mips")
+ (magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
(define %mipsn32el
- (qemu-platform "mipsn32el" "mips"
- (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff")))
+ (qemu-platform
+ (name "mipsn32el")
+ (family "mips")
+ (magic (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
(define %mips64
- (qemu-platform "mips64" "mips"
- (bv "\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff")))
+ (qemu-platform
+ (name "mips64")
+ (family "mips")
+ (magic (bv "\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
(define %mips64el
- (qemu-platform "mips64el" "mips"
- (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff")))
+ (qemu-platform
+ (name "mips64el")
+ (family "mips")
+ (magic (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
(define %riscv32
- (qemu-platform "riscv32" "riscv"
- (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff")))
+ (qemu-platform
+ (name "riscv32")
+ (family "riscv")
+ (magic (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
(define %riscv64
- (qemu-platform "riscv64" "riscv"
- (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff")))
+ (qemu-platform
+ (name "riscv64")
+ (family "riscv")
+ (magic (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
(define %sh4
- (qemu-platform "sh4" "sh4"
- (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00")
- (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff")))
+ (qemu-platform
+ (name "sh4")
+ (family "sh4")
+ (magic (bv "\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
(define %sh4eb
- (qemu-platform "sh4eb" "sh4"
- (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a")
- (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff")))
+ (qemu-platform
+ (name "sh4eb")
+ (family "sh4")
+ (magic (bv "\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
(define %s390x
- (qemu-platform "s390x" "s390x"
- (bv "\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16")
- (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff")))
+ (qemu-platform
+ (name "s390x")
+ (family "s390x")
+ (magic (bv "\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
(define %aarch64
- (qemu-platform "aarch64" "arm"
- (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff")))
+ (qemu-platform
+ (name "aarch64")
+ (family "arm")
+ (magic (bv "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff"))))
(define %hppa
- (qemu-platform "hppa" "hppa"
- (bv "\x7f\x45\x4c\x46\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x0f")
- (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff")))
+ (qemu-platform
+ (name "hppa")
+ (family "hppa")
+ (magic (bv "\x7f\x45\x4c\x46\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x0f"))
+ (mask (bv "\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff"))))
(define %qemu-platforms
(list %i386 %i486 %alpha %arm %sparc32plus %ppc %ppc64 %ppc64le %m68k
@@ -715,9 +764,7 @@ potential infinite waits blocking libvirt."))
(qemu qemu-binfmt-configuration-qemu
(default qemu))
(platforms qemu-binfmt-configuration-platforms
- (default '())) ;safest default
- (guix-support? qemu-binfmt-configuration-guix-support?
- (default #t)))
+ (default '()))) ;safest default
(define (qemu-platform->binfmt qemu platform)
"Return a gexp that evaluates to a binfmt string for PLATFORM, using the
@@ -733,14 +780,13 @@ given QEMU package."
(bytevector->u8-list bv))))
(match platform
- (($ <qemu-platform> name family magic mask)
+ (($ <qemu-platform> name family magic mask flags)
;; See 'Documentation/binfmt_misc.txt' in the kernel.
#~(string-append ":qemu-" #$name ":M::"
#$(bytevector->binfmt-string magic)
":" #$(bytevector->binfmt-string mask)
- ":" #$(file-append qemu "/bin/qemu-" name)
- ":" ;FLAGS go here
- ))))
+ ":" #$qemu:static "/bin/qemu-" #$name
+ ":" #$flags))))
(define %binfmt-mount-point
(file-system-mount-point %binary-format-file-system))
@@ -779,19 +825,6 @@ given QEMU package."
'#$(map qemu-platform-name platforms))
#f)))))))
-(define qemu-binfmt-guix-chroot
- (match-lambda
- ;; Add QEMU and its dependencies to the guix-daemon chroot so that our
- ;; binfmt_misc handlers work in the chroot (otherwise 'execve' would fail
- ;; with ENOENT.)
- ;;
- ;; The 'F' flag of binfmt_misc is meant to address this problem by loading
- ;; the interpreter upfront rather than lazily, but apparently that is
- ;; insufficient (perhaps it loads the 'qemu-ARCH' binary upfront but looks
- ;; up its dependencies lazily?).
- (($ <qemu-binfmt-configuration> qemu platforms guix?)
- (if guix? (list qemu) '()))))
-
(define qemu-binfmt-service-type
;; TODO: Make a separate binfmt_misc service out of this?
(service-type (name 'qemu-binfmt)
@@ -800,9 +833,7 @@ given QEMU package."
(const
(list %binary-format-file-system)))
(service-extension shepherd-root-service-type
- qemu-binfmt-shepherd-services)
- (service-extension guix-service-type
- qemu-binfmt-guix-chroot)))
+ qemu-binfmt-shepherd-services)))
(default-value (qemu-binfmt-configuration))
(description
"This service supports transparent emulation of binaries