diff --git a/.github/workflows/pr.yaml b/.github/workflows/pr.yaml
index ced14f3..cc2a609 100644
--- a/.github/workflows/pr.yaml
+++ b/.github/workflows/pr.yaml
@@ -19,8 +19,8 @@ jobs:
           nix
           --extra-experimental-features flakes
           --extra-experimental-features nix-command
-          --extra-substituters http://172.17.0.1:5000?priority=1?trusted=1
-          --extra-substituters https://alejandra.cachix.org?priority=100?trusted=1
+          --extra-substituters 'http://172.17.0.1:5000?priority=1&trusted=1'
+          --extra-substituters 'https://alejandra.cachix.org?priority=100&trusted=1'
           build
           --print-build-logs
 
@@ -31,8 +31,8 @@ jobs:
           nix
           --extra-experimental-features flakes
           --extra-experimental-features nix-command
-          --extra-substituters http://172.17.0.1:5000?priority=1?trusted=1
-          --extra-substituters https://alejandra.cachix.org?priority=100?trusted=1
+          --extra-substituters 'http://172.17.0.1:5000?priority=1&trusted=1'
+          --extra-substituters 'https://alejandra.cachix.org?priority=100&trusted=1'
           flake
           check
           --print-build-logs
@@ -47,8 +47,8 @@ jobs:
     #           nix \
     #           --extra-experimental-features flakes \
     #           --extra-experimental-features nix-command \
-    #           --extra-substituters http://172.17.0.1:5000?priority=1?trusted=1
-    #           --extra-substituters https://alejandra.cachix.org?priority=100?trusted=1
+    #           --extra-substituters 'http://172.17.0.1:5000?priority=1&trusted=1'
+    #           --extra-substituters 'https://alejandra.cachix.org?priority=100&trusted=1'
     #           print-dev-env \
     #           --no-update-lock-file \
     #           --no-write-lock-file \
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index ddc44dd..1e35c04 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -20,16 +20,16 @@ jobs:
             nix \
             --extra-experimental-features flakes \
             --extra-experimental-features nix-command \
-            --extra-substituters http://172.17.0.1:5000?priority=1?trusted=1 \
-            --extra-substituters https://alejandra.cachix.org?priority=100?trusted=1 \
+            --extra-substituters 'http://172.17.0.1:5000?priority=1&trusted=1' \
+            --extra-substituters 'https://alejandra.cachix.org?priority=100&trusted=1' \
             build \
             --print-build-logs
 
             nix \
             --extra-experimental-features flakes \
             --extra-experimental-features nix-command \
-            --extra-substituters http://172.17.0.1:5000?priority=1?trusted=1 \
-            --extra-substituters https://alejandra.cachix.org?priority=100?trusted=1 \
+            --extra-substituters 'http://172.17.0.1:5000?priority=1&trusted=1' \
+            --extra-substituters 'https://alejandra.cachix.org?priority=100&trusted=1' \
             develop \
             --profile \
             develop