update nix dependencies with niv-update

* changes to nix-build output:

Version changes:
[U.]    glibc  2.39-5 -> 2.39-31
Closure size: 26 -> 26 (23 paths added, 23 paths removed, delta +0, disk usage +4.1KiB).

* changes to nix-shell output:

Version changes:
[C.]    at-spi2-core               2.44.0, 2.50.2 -> 2.44.0, 2.52.0
[U.]    aws-c-auth                 0.7.16 -> 0.7.17
[U.]    aws-c-common               0.9.14 -> 0.9.15
[U.]    aws-c-io                   0.14.6 -> 0.14.7
[U.]    aws-c-s3                   0.5.4 -> 0.5.7
[U.]    aws-crt-cpp                0.26.4 -> 0.26.8
[U.]    aws-sdk-cpp                1.11.296 -> 1.11.309
[U.]    boehm-gc                   8.2.4 -> 8.2.6
[C.]    gdk-pixbuf                 2.42.10, 2.42.8 -> 2.42.11, 2.42.8
[U.]    getent-glibc               2.39-5 -> 2.39-31
[C.]    glib                       2.72.0, 2.78.4, 2.78.4-bin -> 2.72.0, 2.80.0, 2.80.0-bin
[C.]    glibc                      2.33-117, 2.33-117-bin, 2.33-117-dev, 2.39-5, 2.39-5-bin, 2.39-5-dev, 2.39-5-getent -> 2.33-117, 2.33-117-bin, 2.33-117-dev, 2.39-31, 2.39-31-bin, 2.39-31-dev, 2.39-31-getent
[C.]    gobject-introspection      1.72.0, 1.78.1 -> 1.72.0, 1.80.1
[C.]    gsettings-desktop-schemas  42.0, 45.0 -> 42.0, 46.0
[C.]    libX11                     1.7.2, 1.8.7 -> 1.7.2, 1.8.9
[C.]    libXdmcp                   1.1.3, 1.1.4 -> 1.1.3, 1.1.5
[U.]    libarchive                 3.7.2-lib -> 3.7.3-lib
[U.]    libcpuid                   0.6.4 -> 0.6.5
[C.]    libpciaccess               0.16, 0.18 -> 0.16, 0.18.1
[C.]    libxcb                     1.14, 1.16 -> 1.14, 1.17.0
[C.]    linux-pam                  1.5.2, 1.6.0 -> 1.5.2, 1.6.1
[U*]    nixd                       2.1.0 -> 2.1.2
[C.]    pango                      1.50.6, 1.51.2 -> 1.50.6, 1.52.2
[U.]    pcsclite                   2.0.3-lib -> 2.1.0-lib
[U.]    s2n-tls                    1.4.9 -> 1.4.12
[C.]    tracker                    3.3.0, 3.6.0 -> 3.3.0, 3.7.1
Closure size: 1137 -> 1137 (842 paths added, 842 paths removed, delta +0, disk usage +1.9MiB).

nix/sources.json

@@ -5,10 +5,10 @@
         "homepage": "",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "58a1abdbae3217ca6b702f03d3b35125d88a2994",
-        "sha256": "05rpyikxpjf15nrzggrx4m0kjkjcmpyhm714nfrbhsp5cp1x1m4r",
+        "rev": "e9be42459999a253a9f92559b1f5b72e1b44c13d",
+        "sha256": "11ni93vyjnw2i9aq1lsy5by4zj80b6ngwzh1lhgjfkrfpsiwgc0f",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/58a1abdbae3217ca6b702f03d3b35125d88a2994.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/e9be42459999a253a9f92559b1f5b72e1b44c13d.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "olderIdeaNixpkgs": {