diff --git a/nix/drun.nix b/nix/drun.nix
index 2a0b84b25f8..d7251fe21bc 100644
--- a/nix/drun.nix
+++ b/nix/drun.nix
@@ -21,6 +21,8 @@ pkgs:
           "build-info-0.0.27" = "sha256-SkwWwDNrTsntkNiCv6rsyTFGazhpRDnKtVzPpYLKF9U=";
           "cloudflare-0.12.0" = "sha256-FxCAK7gUKp/63fdvzI5Ufsy4aur74fO4R/K3YFiUw0Y=";
           "icrc1-test-env-0.1.1" = "sha256-2PB7e64Owin/Eji3k8UoeWs+pfDfOOTaAyXjvjOZ/4g=";
+          "ic-bn-lib-0.1.0" = "sha256-wqWfF70B+YQWg63yiEvIxOq+LN1AasrNXcyPkDM4/jw=";
+          "ic-canister-sig-creation-1.1.0" = "sha256-c47Fh4kZbmezWCYVHMci2BMXJfESaOGsyNlWh8YR6oU=";
           "jsonrpc-0.12.1" = "sha256-3FtdZlt2PqVDkE5iKWYIp1eiIELsaYlUPRSP2Xp8ejM=";
           "lmdb-rkv-0.14.99" = "sha256-5WcUzapkrc/s3wCBNCuUDhtbp17n67rTbm2rx0qtITg=";
         };
@@ -42,19 +44,6 @@ pkgs:
 EOF
         cd -
 
-        # static linking of libunwind fails under nix Linux
-        patch rs/monitoring/backtrace/build.rs << EOF
-@@ -1,8 +1,2 @@
- fn main() {
--    if std::env::var("TARGET").unwrap() == "x86_64-unknown-linux-gnu" {
--        println!("cargo:rustc-link-lib=static=unwind");
--        println!("cargo:rustc-link-lib=static=unwind-ptrace");
--        println!("cargo:rustc-link-lib=static=unwind-x86_64");
--        println!("cargo:rustc-link-lib=dylib=lzma");
--    }
- }
-EOF
-
         mkdir -p .cargo
         cat > .cargo/config.toml << EOF
 [target.x86_64-apple-darwin]
diff --git a/nix/sources.json b/nix/sources.json
index bef8be1fa0a..b3961ffedb1 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -21,15 +21,15 @@
         "version": "3.2.25"
     },
     "ic": {
-        "branch": "luc/adjust-drun",
+        "branch": "luc/lower-case-persistence-modes",
         "description": "Internet Computer blockchain source: the client/replica software run by nodes",
         "homepage": "",
         "owner": "luc-blaeser",
         "repo": "ic",
-        "rev": "bebe89514a6abd26e940b295323823169911a965",
-        "sha256": "1g68fyi5acbcgs2kjribk97fj8ki5g6pd99nwl5azz1rw1b0xycx",
+        "rev": "48ba595fb1a6bc828e7e9dae976db42b5526a5b6",
+        "sha256": "0136hxidak4qsk0nhjdy2nmciwb0lprm07vs117xdw3cp4m6py2z",
         "type": "tarball",
-        "url": "https://github.com/luc-blaeser/ic/archive/bebe89514a6abd26e940b295323823169911a965.tar.gz",
+        "url": "https://github.com/luc-blaeser/ic/archive/48ba595fb1a6bc828e7e9dae976db42b5526a5b6.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "ic-hs": {